Must-See Celeb Sightings: September 16-22, 2019

The adorable couple coordinated for their front-row appearance at the Boss show during Milan Fashion Week in Italy on Sep. 22.

The Jonas Brothers got into the groove while performing in Kansas City, Missouri, on Sept. 22.

The BFFs were back in action at the Green Carpet Fashion Awards in Milan, Italy, on Sept. 22.

Flower power! The Modern Family star looked picture perfect at the the Dolce&Gabbana fashion show during Milan Fashion Week SS2020 in Italy on Sept. 22.

Sin City sensation! The "Slide Away" singer belted her heart out during her 2019 iHeartRadio Music Festival performance in Las Vegas on Sept. 21.

The ladies stuck close together at the Brent Shapiro Foundation Summer Spectacular 2019 in Beverly Hills on Sept. 21.

The O.G. Beetlejuice star was honored by Alex Brightman, who plays the titular character in the Broadway version of Davis' beloved '80s film, at the Winter Garden Theatre in New York City on Sept. 21.

The "Truth Hurts" singer brought the juice to Bustle’s 2nd annual Rule Breakers Festival in Brooklyn's Prospect Park on Sept. 21.

The actresses both looked sharp at the Salvatore Ferragamo show during Milan Fashion Week on Sept. 21.

The trio got gussied up for the Los Angeles LGBT Center's 50th-anniversary celebration at the Greek Theatre in Los Angeles on Sept. 21.

The couple packed on the PDA at the Flamingo Go Pool Dayclub at Flamingo Las Vegas on Sept. 21.

The 22-year-old model posed backstage at the Etro fashion show during Milan Fashion Week on Sept. 20.

The 17-year-old singer was a good guy in Las Vegas, surprising partygoers at the official Life is Beautiful Pool Party Series at the Downtown Grand Hotel & Casino on Sept. 20.

The "Talk" singer hit the high notes while performing in Glasgow, Scotland, on Sept. 20.

We're not worthy! J.Lo shut down Milan Fashion Week, shocking attendees at the Versace SS20 runway show on Sept. 20 when she closed the event in a dress that resembled the 2000 GRAMMY Awards look that made her into a style icon.

The Seberg star rocked her fave cool girl pose at her film's premiere during the 67th San Sebastian International Film Festival in Spain on Sept. 20.

The boy band and the DJ posed for pics backstage at the 2019 iHeartRadio Music Festival at Las Vegas' T-Mobile Arena on Sept. 20.

The 35-year-old actress looked uber-glam in a shimmery, plunging maroon-and-cobalt blue dress at the 2019 Daytime Beauty Awards in Los Angeles on Sept. 20.

The "It Was a Good Day" rapper performed to a sold out crowd at the Welcome to the West 2019, festival, presented by Cabana Life Concerts, at Toyota Arena in Ontario, California, on Sept. 20.

Leaving us green with envy! The Sports Illustrated Swimsuit model looked like a total fashionista in a silk suit as she exited the Falconeri store in Milan, Italy, on Sept. 20.

Sitcom heroes! The Scrubs star and Saved by the Bell alum both visited the SiriusXM studios in New York City on Sept. 20.

The bubbly model brought son Miles up on stage with her and husband John Legend (not pictured) at the Impossible Foods Grocery Los Angeles launch at Gelson's Westfield Century City on Sept. 19.

The cute couple looked like they were in the best mood ever at the BET+ red carpet and launch party at NeueHouse Los Angeles on Sept. 19.

Pretty in pink! The Captain Marvel star looked at Tiffany & Co.'s "Vision & Virtuosity" exhibition in Shanghai on Sept. 19.

Velvet vixen! Clad in a maroon Alexander Wang dress and Brian Atwood shoes, the Empire star was beaming as she arrived at the Late Show With Stephen Colbert set in New York City on Sept. 19.

The actresses looked lovely while co-hosting a live episode of the goop podcast with Banana Republic in Beverly Hills on Sept. 19.

The Younger star kept the '90s summer vibes going while out in Los Angeles on Sept. 19.

The Queer Eye designer held court during the Better Homes & Gardens Stylemaker 2019 cocktail hour at New York City's PUBLIC Hotel on Sept. 19.

The purple-haired TV personality posed for a pic during the 71st Emmy Awards Preview Day at Los Angeles' Microsoft Theater on Sept. 19.

The English singer's suit nicely complemented Zellweger's red, ruched floral strapless dress as they hit the red carpet for the Judy premiere in Beverly Hills on Sept. 19.

The couples made it a double date night at the Samsung Gives Annual Charity Gala at NYC's Manhattan Center on Sept. 19.

The rapper and the Masked Singer judge bonded at City of Hope's 15th Annual Songs of Hope event in Sherman Oaks, California, on Sept. 19.

Neon Queen! All eyes were on the brightly outfitted singer as she walked though Itaewon in Seoul, South Korea, on Sept. 19.

The Duchess of Cambridge carried posies in her hand after visiting the Sunshine House Children and Young People's Health and Development Centre in South London on Sept. 19.

Pretty in polka dots! The Kennedys After Camelot star flashed a huge smile from her front row seat at the Fendi show during Milan Fashion Week on Sept. 19.

The Charlie's Angels star gave fans a wave as she arrived at the Maria Cristina Hotel during the 67th San Sebastian Film Festival in Spain on Sept. 19.

The mom of four sweetly helped her grandma, MJ, out of an Italian restaurant in Calabasas, California, after they enjoyed lunch together on Sept. 19.

The 58-year-old actor listened carefully as he took part in a press conference in central London on Sept. 19 to present a report on atrocities in South Sudan.

What a crew! The models all rocked black lipstick and shiny monochrome creations as they sashayed down the runway at the Max Mara show during Milan Fashion Week on Sept. 19.

The Ad Astra star looked as handsome as ever at his new movie's Los Angeles premiere on Sept. 18.

Shining bright! The Quantico star stunned in a shimmery, black-and-pink pinstripe Alberta Ferretti suit at the Vogue Japan 20th Anniversary Party in Milan, Italy, on Sept. 18.

Working on her fitness! The pop star donned all-black attire for a hike in the mountains of Santa Monica, California, on Sept. 18. 

The Keeping Up With the Kardashians star pulled off a sartorial optical illusion at her clothing company, Good American's, Hudson's Bay launch in Toronto on Sept. 18.

The blonde beauty made her way to the Prada fashion show during Milan Fashion Week on Sept. 18.

After a quick car makeot sesh, Shawmila looked totally in love as they held hands en route to lunch at Granville in West Hollywood on Sept. 18.

The 21-year-old model paired a black leather trenchcoat and trousers with a white crop top for an abs-baring look at her Missguided collab launch party at Bootsy Bellows in West Hollywood on Sept. 18.

The 56-year-old actress was the gold standard at the Los Angeles premiere of her new film, Corporate Animals, on Sept. 18.

The Ashlee+Evan singer cozied up to the fashion designer as Zoe, Pottery Barn Kids and Pottery Barn Teen celebrated their new collaboration in Los Angeles on Sept. 18.

The "Sativa" singer got her pout on at the Sephora for Kat Von D Beauty True Portrait Foundation launch in New York City on Sept. 18. 

A not-so-mini-me! The late-night talk show host posed with a giant orange Funko version of himself at the Relevance Conference in Santa Barbara, California, on Sept. 18.

The Divorce star looked beautiful in blue as she got into a car en route to an event in New York City on Sept. 18.

The 22-year-old didn't quite stop, but she did snap photos with fans as she kept on moving to her destination in Milan, where she was hitting the runways for fashion week.

While visiting the Ellen DeGeneres Show on Sept. 18, the "Small Talk" singer was gifted with a "marriage carriage" for her cute pup, Nugget, to be pulled in down the aisle at Perry and Orlando Bloom's wedding.

All zipped up! The California girl got ready to hit the runways during Milan Fashion Week in Italy on Sept. 18.

The makeup mogul went for a bold look during a Fenty Beauty event in Seoul, South Korea, on Sept. 17, rocking a bright pink lip with an oversized white suit. 

The glam gals buddied up at POPSUGAR and ABC’s "Embrace Your-Ish" premiere event at Goya Studios in Los Angeles on Sept. 17.

The 40-year-old actress kept the summer vibes going in a purple floral dress as she wandered around New York City on Sept. 17.

The "Bad Guy" singer held court during an intimate conversation and performance at the GRAMMY Museum in downtown Los Angeles on Sept. 17.

The 40-year-old reality star donned a Kardashian fave bodysuit-and-distressed denim combo as she left a studio in Calabasas, California, on Sept. 17.

The "New Look" singer made a fashionable exit from the Chiltern Firehouse in London on Sept. 17.

The model-actress' crazy toned abs were on display as she took her dog, Colombo, for a walk through New York City on Sept. 17.

The Cougar Town alum took a call while running errands in Los Angeles on Sept. 17.

The reality star trio certainly didn't go hungry at the McDonald's & UberEats: McDelivery Night In celebration at New York City's Chelsea Market on Sept. 17.

Sporting her newly blonde locks, an oversized plaid button-down and a vintage light gray tee with a picture of a Doberman Pinscher on it, the 23-year-old model made her way through the airport in Milan on Sept. 17. Jenner is in the Italian city for Milan Fashion Week.

The "IDGAF" singer made the YSL new fragrance U.K. launch party a family affair -- she was joined by mom Anesa, siblngs Gjin and Rina and dad Dukagjin at the Somerset House in London on Sept. 17.

The new Thor was spotted waiting by a valet stand in Los Angeles on Sept. 17.

It was a congruence of powerful ladies at the 2019 Nashville Songwriters Awards at Music City's famed Ryman Auditorium on Sept. 17. Tayla is Loretta's granddaughter and a singer-songwriter in her own right.

The actors checked out a model of the new SoFi Stadium -- where the Los Angeles Chargers will soon be playing -- during the Chargers LUX Launch Party hosted by the NFL team at Spring Place in Beverly Hills on Sept. 17.

The L.A.'s Finest star couldn't stop beaming as she walked the red carpet ahead of America's Got Talent's live taping in Hollywood on Sept. 17.

The model sisters stuck together at LOVE Magazine and YouTube's London Fashion Week party at The Standard on Sept. 16.

The actors attended a special screening of their new series, No te Puedes Esconder, held at the London Hotel in Los Angeles on Sept. 17. No te Puedes Esconder premieres on Telemundo on Sept. 30 at 10 p.m. ET/PT.

Oh my, Mother Monster! Bow down to our lady, who smoldered in ruffles, lace and leather at her Haus Laboratories launch in Santa Monica, California, on Sept. 16.

Hamm embraced his hilarious pal at Netflix's special screening of Between Two Ferns: The Movie in Los Angeles on Sept. 16.

The cute couple also came out for the Between Two Ferns: The Movie premiere.

The 55-year-old actor made a dapper appearance at a Washington, D.C., screening of his new movie, Ad Astra, at the National Geographic Museum on Sept. 16.

The Ben Is Back star flashed her famous smile when she stopped by the new SiriusXM Hollywood Studios to be the first live guest on The Jess Cagle Show on Sept. 16.

Vroom vroom! Smulders smoldered in a red-hot off-the-shoulder sequined number as she celebrated the upcoming premiere of her new drama, Stumptown, at the Petersen Automotive Museum in Los Angeles on Sept. 16.

The Dawson's Creek alum hailed a cab in New York City on Sept. 16.

Signature stare! The former One Direction member was sitting pretty as he visited the Music Choice studio in New York City on Sept. 16.

It was a father-son date night at the Running With the Devil premiere in Beverly Hills on Sept. 16.

A mood! The "Circles" rapper's stage was lit to mellow yellow perfection during his set in Vancouver on Sept. 16.

The co-stars looked lovely at the Netflix special screening of The Politician in London on Sept. 16.

A family affair! Brinkley-Cook enthusiastically hugged her dance partner and mom ahead of Dancing With the Stars' season 28 premiere on Sept. 16. The 21-year-old model was a last-minute replacement after Brinkley injured herself during rehearsals just a couple of days prior.

The actors hammed it up at NBC's Comedy Stars Here event at L.A.'s NeueHouse Hollywood on Sept. 16.

The singers were styling in black-and-white '90s-esque pieces at the Burberry show during London Fashion Week on Sept. 16.

The Game of Thrones star rocked a silky ensemble at the Christopher Kane show during London Fashion Week on Sept. 16.

Jay and Silent Bob struck their usual poses at a Los Angeles screening of 3 From Hell on Sept. 16.

The duo was twinning in sleeveless black ensembles at the JW Anderson SS20 show during London Fashion Week on Sept. 16.

The "Tell Me" rapper sported a casual look while out in Los Angeles on Sept. 16.

The British actor's all-navy look at the American Theatre Wing's 2019 Gala in NYC on Sept. 16 was one for the books -- and the flowers!