Must-See Celeb Sightings: December 9-17, 2019

The holiday queen shone brightly as she got ready to light the Empire State Building in New York City on Dec. 17 in celebration of the 25th anniversary of her newly-minted No. 1 song, "All I Want for Christmas Is You." Carey paired a shimmery silver maxi dress with a $500,000 Wempe necklace for the occasion. 

Talk about animal instincts! The mom of four showed off her curves in an off-the-shoulder snakeskin top and dark brown leather skirt as she arrived at the Blind Dragon in Los Angeles on Dec. 17.

The Marvelous Mrs. Maisel maven was pretty in pastels and florals during her "In Conversation with Jessica Radloff" event at the 92nd Street Y in New York City on Dec. 17.

Mad for plaid! The Bombshell beauty was protected from the rain as she hit the streets of New York City on Dec. 17. 

The Desperate Housewives alum stunned onstage at the Huda Beauty-presented Global Gift Gala Dubai in the United Arab Emirates on Dec. 17.

The 25-year-old actress looked prim and proper at a book signing for Floria Sigismondi's Eat the Sun at Los Angeles' Chateau Marmont on Dec. 17.

The Big Little Lies star looked smart and chic in her all-black suit and glasses while hosting a screening of Queen & Slim at The London in West Hollywood on Dec. 17.

The actors reunited at a Vudu-presented Variety Screening Series showing and Q&A of their film, Once Upon a Time... In Hollywood, on Dec. 17.

One day before performing at 103.5 KISS FM's Jingle Ball 2019 in the Windy City, the "All the Time" singer celebrated her birthday at TAO Chicago on Dec. 17, where guests enjoyed dishes like Spicy Tuna Tartare and Cantonese Cauliflower, as well as a post-meal Giant Fortune Cookie dessert presentation.

The co-stars looked gorgeous at the world premiere of Cats in New York City on Dec. 16.

The Migos member struck a stylish pose at the Offset X FaZe Clan launch at the collab's Los Angeles pop-up on Dec. 16.

The lovebirds made the Hollywood premiere of Star Wars: The Rise of Skywalker premiere into a date night as they hit the blue carpet together on Dec. 16.

The trio hung out at the Baby2Baby Holiday Party, co-presented by FRAME, at Montage Beverly Hills on Dec. 15.

The Carnival Row star looked dapper at a Flaunt magazine event celebrating the release of their "Voyage Issue" at the Bourdon House in London on Dec. 15.

The shining KarJenner sisters huddled around the rapper at this 50th birthday party in Los Angeles on Dec. 14. 

Just days before he announced he was taking a break from touring, the "We Go High" rapper took the stage on day one of Rolling Loud Fueled by West Coast Cure Los Angeles 2019 at Banc of California Stadium on Dec. 14.

The Dawson's Creek alum surprised guests at the Frederick Wildman & Sons Wines pop-up at The Shops at Columbus Circle in New York City on Dec. 14 as she got behind the complimentary gift wrapping station to wrap customers’ presents! Olivia Palermo and Mario Cantone also participated as celebrity gift wrappers at the event where Santi & Lamberti wines were featured.

The "Motivation" singer sizzled in a two-piece snakeskin look at the 9th Annual Streamy Awards in Beverly Hills on Dec. 13.

The Frozen 2 star helped assemble 600 Hello Bello bundles for the Good+Foundation on Dec. 13 to help spread joy to low-income families this holiday season.

The Friends From College star and his wife, Elisa Pugliese, enjoyed a date night at Louis XIII and The Film Foundation's premiere of the restored 1919 classic, The Broken Butterfly, at Los Angeles' Egyptian Theater on Dec. 13.

The Like a Boss stars struck boss-like poses at a photocall for their film at the Whitby Hotel in New York City on Dec. 14.

This trio of strong women made one formidable force at the YouTube Music-presented Billboard Women in Music 2019 event in Los Angeles on Dec. 12.

Got the blues? The Keeping Up With the Kardashians star hit the streets of New York City on Dec. 12.

Surf's up! The Sky Is Pink star glided into the trailer launch of Baywatch in Mumbai, India, on Dec. 12.

The actress and the former first lady embraced onstage during an Obama Foundation event in Kuala Lumpur, Malaysia, on Dec. 12.

The model looked casual cool in a black-and-blue ensemble while out in New York City on Dec. 12.

All in the family! The Morning Show star felt nothing but love as she was supported by her older kids, son Deacon and daughter Ava, and husband Jim Toth, at the Hollywood Reporter's Power 100 Women in Entertainment breakfast gala in Los Angeles on Dec. 11. Witherspoon was honored with the Sherry Lansing Leadership Award at the event.

The former Victoria's Secret Angel looked super chic as she strolled through New York City's West Village on Dec. 11.

The Duchess of Cambridge looked absolutely regal as she chatted with guests at an evening reception for members of the Diplomatic Corps at Buckingham Palace in London on Dec. 11.

The model-actress stunned in a cut-out LBD at the Hollywood premiere of Uncut Gems on Dec. 11.

The co-stars hammed it up for their own cameras at a special fan event for Star Wars: The Rise of Skywalker in Tokyo, Japan, on Dec. 11.

All that glitters! The "Lose You to Love Me" singer shined in shimmery gold slacks, which she paired with a long camel coat, black shirt and round sunglasses, while out in London on Dec. 11.

The 24-year-old model donned a red-and-black plaid sleep set as she posed in front of a Christmas tree at the Calvin Klein Pajama Party in New York City on Dec. 11.

The Us star struck a pose in her bright Coach 1941 ensemble during a busy press day in New York City on Dec. 11.

The fashion designer celebrated her 2020 ready-to-wear collection and Winter Box of Style with a Studio 54-themed soiree featuring specialty Tanqueray cocktails at the Peppermint Club in West Hollywood on Dec. 11.

Turns out it is easy being green! The Stranger Things star looked ready to get down to business in her olive-hued ensemble at the 2019 WWD Beauty Inc Awards at the Rainbow Room in New York City on Dec. 11.

The beauty mogul turned the streets of Beverly Hills into her very own runway during a girls night out on Dec. 10.

The gorgeous trio stuck close together at the premiere of their new film, Bombshell, in Los Angeles on Dec. 10.

The Keeping Up With the Kardashians star paired a shimmery cardigan with flared, black leather tie-up pants while out to lunch with sister Khloe Kardashian (not pictured) at La Plata in Agoura Hills, California, on Dec. 10.

The blonde beauties both looked lovely in all-black looks at the debut party for Chanel N°5 in the Snow at the Standard High Line in New York City on Dec. 10.

The Charlie's Angels star put an edgy spin on a pastel pink Chanel ensemble at an Audi-presented special screening of Amazon Studios' Seberg at the Directors Guild of America in Los Angeles on Dec. 10.

The "Sign of the Times" singer was sitting pretty at Spotify's launch for his new album, Fine Line, where a private listening party for his fans was held in Los Angeles on Dec. 11.

She's on fire! The "Graveyard" singer helped Pandora Live closed out 2019 with a lit set at Avant Gardner in Brooklyn, New York, on Dec. 10. The pop star was also presented with a Pandora Billionaire plaque for achieving over 2.5 billion streams on the service.

The co-stars snapped a selfie with the audience at a screening of The Gentlemen in London on Dec. 10.

The actresses bonded at Naughty or Nice: A Swarovski Holiday Celebration in New York City on Dec. 10.

The Richard Jewell co-stars had nothing but love for one another at an Atlanta screening of their film on Dec. 10.

Nothing but love for Hart! The actor was flanked by his pals during his Hand and Footprint Ceremony at the TCL Chinese Theatre in Hollywood on Dec. 10.

The punk icons rocked out at the "Girls Just Wanna Have Fun" singer's 9th Annual Cyndi Lauper & Friends: Home for the Holidays benefit concert, presented by Marriott International and AEG, in Los Angeles on Dec. 10. All proceeds from the nearly three-hour concert go to programs supported by True Colors United, the non-profit Lauper co-founded over 10 years ago to help end homelessness among LBGTQ youth. 

The 23-year-old model topped a white sweatsuit ensemble with a long camel coat for an afternoon of shopping and doctors appointments in Beverly Hills on Dec. 10.

The couple stuck close together at a photocall for the upcoming production of Medea in Brooklyn, New York, on Dec. 10.

The "Too Hot" singer looked quite dapper in a forest green suit at a Cats photocall in Berlin, Germany, on Dec. 10. 

The "Never Really Over" singer giddily performed during 101.3 KDWB's Capital One-presented Jingle Ball 2019 in St. Paul, Minnesota, on Dec. 9.

The couple made a rare red carpet appearance at PUBG Mobile's #FIGHT4THEAMAZON event at Avalon Hollywood in L.A. on Dec. 9.

The Rock got the giggles as his co-star leaped across him on the blue carpet at the Jumanji: The Next Level premiere in Hollywood on Dec. 9.

The mom of three rocked a purple leopard-print dress as she hosted a launch party for her new King St. Vodka at King Restaurant in New York City on Dec. 9.

A little height difference didn't stop the former NBA pro and the Women's World Cup soccer champ from perfecting their prom pose at Sports Illustrated's Sportsperson of the Year 2019 awards at the Ziegfeld Ballroom in New York City on Dec. 9.

The hilarious duo cracked each other up at Stella McCartney's Stellabration party in New York City on Dec. 9.

The actors met up at Spotify's A Decade of Wrapped celebration with Maggie Rogers in Los Angeles on Dec. 9.

The music icons performed together during "We'll Be Together Again," the Rainforest Fund's 30th-anniversary benefit concert, at New York City's Beacon Theatre on Dec. 9.

The Victorious alum didn't let a shower rain on her parade as she happily strolled through midtown Manhattan with her umbrella on Dec. 9.

The married duo was spotted leaving the MS Society's Carols by Candlelight event in London on Dec. 9.

The fashion designer was joined by this trio of bold, fashionable ladies at his Moschino Pre-Fall 2020 Runway Show at the New York Transit Museum in Brooklyn, New York, on Dec. 9.

The triple threat was in high spirits when she stepped out in Miami on Dec. 9, shortly after learning she was nominated for a Golden Globe for her role as Ramona in Hustlers.

The trio looked bright-eyed and bushy-tailed as they announced the 77th Annual Golden Globe Award nominations from Beverly Hills on Dec. 9.

The pregnant model rocked a pretty floral House of CB dress as she exited the Tonight Show Starring Jimmy Fallon set in New York City on Dec. 9.

The Canadian pop star flashed a big smile at the 2019 TPG Awards at the Intrepid Sea, Air & Space Museum in New York City on Dec. 9.

The "Senorita" singer delighted fans when she performed a cappella during an exclusive album listening party at Mastercard's Priceless culinary collective in New York City on Dec. 11.

It was nearly impossible to miss the brightly dressed singer as he left a Los Angeles dance studio on Dec. 9.

The Little Women stars and their director got into formation at a SiriusXM Town Hall for their new film in New York City on Dec. 9.

Pretty in pink! The fashionista was a fine-feathered friend as she attended an intimate BAFTA Breakthrough Brits dinner at Kettner's in London on Dec. 9.

The "K-12" singer commanded the stage in a voluminous floral confection during a London concert on Dec. 9.