PICS: Star Sightings

Keri Russell appeared in a green trench coat for the Altuzarra for Target launch event in New York City on September 4.

Ivanka Trump showed up in all black for the Altuzarra for Target launch event in New York City on September 4.

Gwen Stefani looked fabulously slim given her mom-of-a-young-baby status as she stepped out in NYC on Thursday. The mother of three, including six-month-old Apollo, paired gray tailored pants with a black top, topped off with fire engine-red lips.

It's been a while since Renee Zellweger has been spotted on  a red carpet, but she did so in style on Sept. 3. The Bridget Jones' Diary actress showed up to the 2014 Couture Council Award Luncheon Benefit for the Museum at FIT honoring Carolina Herrera at Lincoln Center in New York City.

Jason Segel and Cameron Diaz's Sex Tape has gone international! The romantic comedy duo ventured across the pond for the romantic comedy's photocall on September 3 in London, England.

Jessie J sported a dangerously high slit at the GQ Men of the Year Awards at The Royal Opera House on September 2 in London.

Gerard Butler posed on the red carpet of the GQ Men of the Year Awards at The Royal Opera House in London on September 2.

Jay Z hit the Philadelphia Made in America Fest wearing a Muhammad Ali Roots of Fight tee.

The Maroon 5 frontman and "more masculine" newlywed brings his handsome face to the Today show for their concert series.

The Sin City actress was too cute celebratin the Budweiser Made in America Music Festival along with American Eagle Outfitters. Jay Z and Beyoncé were also at the festival and couldn't keep their hands off each other.

To the delight of her fans, Uma Thurman blew a kiss upon arriving to the Nymphomaniac: Volume 2 - Directors Cut premiere during the 71st Venice Film Festival on September 1 in Venice, Italy.

Maroon 5 frontman Adam Levine brought the crowd to their feet on NBC's Today show on September 1 in New York City.

Al Pacino gives a thumbs up at the premiere of Manglehorn at the 71st Venice Film Festival in Italy on August 30.

You know they're showing a lot of skin when these are Kylie and Kendall Jenner's more conservative outfits. Dressed in black and baring midriff and undergarments, the Keeping Up with the Kardashians teens showed up to DuJour Magazine's Jason Binn celebrating Kendall and Kylie Jenner's Bruce Weber shoot on August 28 in New York City.

Where's Justin Theroux? Jennifer Aniston posed solo in a shimmery Saint Laurent mini-dress and black blazer at the premiere of Life of Crime at the ArcLight Cinemas in Hollywood, Calif. on Aug. 27.

Real Housewives Of Miami star Joanna Krupa rocked a short, blue romper that showed off her toned legs when she participated in the Hollywood Charity Series Of Poker at the Seminole Hard Rock Hotel & Casino in Tampa, Florida on August 27, 2014. The event benefited Habitat For Humanity.

True Detective and Parenthood star Alexandra Daddario stepped out in celebration of Juicy Couture's new fragrance, Viva La Juicy Gold Couture, on Tuesday, August 26. "Everybody should incorporate fragrance into their everyday beauty routine. It's something that ties together your outfit," she told ET.

Birdman star Emma Stone walked the red carpet in emerald at the movie's premiere during the Venice Film Festival on August 27.

Matt LeBlanc and Andrea Anders kicked off the Emmy festivities at the Showtime 2014 Emmy Eve Soiree at Sunset Tower on August 24 in West Hollywood.

"Tattoo" singer Hunter Hayes showed off a temporary henna tattoo on August 22 while performing on NBC's Today show, where he announced his Tattoo (Your Name) Tour.

Brian May and Adam Lambert rocked out in Perth, Australia during the Queen and Adam Lambert Tour on August 22.

New Dancing with the Stars judge Julianne Hough showed up off her sexy dancer's body at the 2014 Heineken US Open Kick Off Party on August 21 in New York City.

Action star Dwayne Johnson and his supermodel-turned-actress co-star Irina Shyak both dressed to impress while walking the carpet at the European premiere of their film Hercules at the CineStar theater in Berlin, Germany on August 21.

Mad Men star Jon Hamm feigned surprise when he showed up for the screening of Million Dollar Arm at The May Fair Hotel in London on August 21.

Fashion fail?! Tyra Banks showed up wearing what looked to be an ill-fitting, futuristic jumpsuit to America's Next Top Model Cycle 21 premiere party presented by NYLON and LINE in Los Angeles on August 20.

17-year-old Chloe Grace Moretz, best known for her role as the purple-haired Hit Girl in the Kick Ass franchise, looked classy and cute at the red carpet premiere of her upcoming drama If I Stay at the TLC Chinese Theater in Hollywood on August 20.

During Lindsay Lohan's appearance on The Tonight Show on August 20, host Jimmy Fallon cheerfully helped the Mean Girls actress complete the ALS Ice Bucket Challenge, leaving her absolutely drenched, shocked and freezing.

Seth Meyers addressed the press at the 66th Annual Primetime Emmy Awards preview day at Nokia Theatre L.A. Live on August 20.

The True Blood hunk brought his chiseled body to the launch of New Balance and James Jeans powered by ISKO.

Who's hotter: the blonde or the brunette? Hart of Dixie actress Jaime King posed with her pal and Sin City: A Dame To Kill For star Jessica Alba at the sequel's premiere at TCL Chinese Theatre on August 19 in Hollywood, Calif.

Singer, TV personality and fashion designer Kelly Osbourne showed off some of the new ensembles that make up her upcoming fashion line Stories…

The first look and photo shoot was held in New York City on August 19.

Hilary Duff was snapped in a floppy hat and ripped jeans while leaving lunch at La Conversation Café in Los Angeles on August 19.

This is what it looks like when a supermodel and a pop star dine on donuts! Rita Ora and Chrissy Teigen were spotted eating sweet treats while celebrating the launch of the DKNY MYNY fragrance at General Worth Square at Madison Square Park on August 19 in New York City.

The Real Housewives of New Jersey star Melissa Gorga and her husband Joe Gorga celebrated his 40th birthday in style at Vic & Anthony's Steakhouse at the Golden Nugget Casino in Atlantic City, New Jersey on August 16.

Is that Jared Leto under all that hair? The Oscar winner wore his most hipster attire when his band 30 Seconds To Mars visited Music Choice on August 18 in New York City.

Golden Globe winner Richard Gere dressed down in jeans, a t-shirt and a green corduroy jacket for the premiere of his new, independent animated film Henry & Me at the Ziegfeld Theatre in New York City on August 18.

Kick Ass star Chloe Grace Moretz wore a sophisticated and stylish floral print dress with a white collar to the premiere of her new romantic drama If I Stay at the Landmark Sunshine Cinema in New York City on August 18.

Fashion Police host Kelly Osbourne was all smiles on Aug. 16 at the 3rd Annual BeautyCon in Los Angeles presented by Elle. And who can blame her--a whole day of talking beauty sounds amazing!

Heidi Klum's swingin' style caught her Project Runway cohort Tim Gunn off guard when the two met up on the red carpet at the 2014 Creative Arts Emmy Awards on Aug. 16 in Los Angeles, Calif.

Channeling Madonna? "Shine Ya Light" singer Rita Ora rocked out in tattered blue jeans and a white, beaded bikini top at the V Festival at Hylands Park in Chelmsford, England on August 17.

Sin City: A Dame To Kill For star Jessica Alba showed her Los Angeles Dodgers spirit when she threw the ceremonial first pitch before the game, which pitted the home team against the Milwaukee Brewers at Dodger Stadium on August 17.

Joe Jonas celebrated his 25th birthday with brother Nick and friends at the Encore Beach Club at the Wynn in Las Vegas, Nevada on August 16. In a muscle t-shirt, he overlooks the pool-party scene.

Ed Sheeran performs on the first day of the V Festival at Hylands Park in Chelmsford, England on August 16, 2014.

Demi Lovato was up bright and early for ABC's Good Morning America on August 15. The actress and singer was snapped on stage at Rumsey Playfield in New York City.

Can you imagine if Veronica Mars joined forces with Scandal's Olivia Pope?! That basically happened on Aug. 14 when a pregnant Kristen Bell posed with new mom Kerry Washington at the Hollywood Foreign Press Association's Grants Banquet in Beverly Hills, Calif.

Disney's Maleficent actress Elle Fanning looked classically beautiful in a bright red dress which she wore to the Hollywood Foreign Press Association’s annual Grants Banquet at the Beverly Hilton Hotel in Beverly Hills on August 14.

Arrested Development star Michael Cera struck a pose at the photo call for his Broadway play This Is Our Youth outside the Cort Theater in New York City on August 14.

Jared Leto was snapped in a bright tank top and shades while footing it through New York on August 14.

Red singer Taylor Swift showed off her svelte figure on The Tonight Show starring Jimmy Fallon, but also wasn't afraid to go geeky when she joined Jimmy on the Ew! show!

Katie Holmes was caught making some goofy faces as she hung out with some adorable kids at the Marvel Universe LIVE! NYC world premiere on August 13 in New York City.

Demi Lovato rocked this super-colorful, form-fitting dress with a black leather jacket and piano-key clutch as she went out and about around New York City on August 13.

Prince Harry was snapped in London giving a rousing speech to the British Armed Forces team ahead of the Invictus Games at Potters Field Park on August 13. The Invictus Games is an international Paralympic event for wounded soldiers named after the poem by William Ernest Henley.

Joe Manganiello and Sofia Vergara took in Justin Timberlake's Los Angeles show in style, partying at a private PUMA-hosted event at Hyde Staples Center. The hot couple celebrated with Vergara's Modern Family co-star Jesse Tyler Ferguson and his hubby Justin Mikita; Glee star Lea Michele and her beau Matthew Paetz; and newlyweds Naya Rivera and Ryan Dorsey.

Kim Kardashian marched through the streets of New York on August 12, wearing a beige top and green skirt.

Britney and boyfriend David Lucado were snapped grabbing lunch in Calabasas on August 12.

Jessica Alba enjoyed her time in the makeup chair at Good Morning America in New York on August 12.

Jason Schwartzman became one with nature during the photocall for Listen Up Philip at the 67th Locarno Film Festival in Locarno, Switzerland on August 12.

This is one glamorous trio. Pretty in pink, Katie Holmes posed with her beautiful co-stars Odeya Rush and Meryl Streep at The Giver premiere after-party on August 11 in New York City.

Action star Jason Statham and supermodel Rosie Huntington-Whiteley looked inexcusably gorgeous at The Expendables 3 premiere at TCL Chinese Theatre on August 11 in Hollywood, Calif.

Actor Peter Capaldi, who plays the 12th incarnation of The Doctor on the hit BBC series Doctor Who, stood with his on-screen companion Jenna Coleman outside their TARDIS – a time machine/space ship that looks like a 1960's police telephone box – during a promotional tour at Dendy Opera Quays theater in Sydney, Australia on August 12.

Taylor Swift wore a stunning gown in her signature red color, while walking the red carpet of The Giver premiere in New York on August 11.