Star Tracks: Jonah Hill Rocks a New 'Do, Plus Selena Gomez, Nicole Kidman & More

Wednesday in Los Angeles, Selma Blair saddles up to enjoy a ride on her horse, Ivy.

Nikolaj Coster-Waldau leaves the United Nations after attending the EU-UN Spotlight Initiative to Eliminate Violence Against Women and Girls.

Fresh off her Emmy win, Nicole Kidman poses before the Futures Without Violence Hosts Big Little Night event in support of domestic violence advocacy in San Francisco on Tuesday.

Keith Urban performs on stage in Fairfax, Virginia, at the VetsAid Charity Benefit Concert in support of veterans and their families on Wednesday.

Naomi Watts and her dog walk around New York City on Wednesday.

She's got talent! Twelve-year-old ventriloquist and America's Got Talent winner Darci Lynne Farmer can't keep her shock at bay while posing with one of the show's judges, Melanie "Mel B" Brown.

Mark Duplass and Katie Aselton keep things casual on the carpet for the premiere of Netflix's new animated series, Big Mouth, on Wednesday.

Kris Jenner is red hot in the front row of the Fendi show during Milan Fashion Week — where daughter Kendall Jenner walked the runway!

Also on the runway at Fendi, Kaia Gerber rocks a blue 'do.

Bella Hadid was there, too, in an elaborate leather jacket.

Jonah Hill is almost unrecognizable on the Long Island set of his new show, Maniac, Wednesday.

Harry Styles performs on stage Wednesday in Los Angeles for the opening concert of his first solo tour.

Fergie celebrates at the premiere of Fergie Double Duchess: Seeing Double on Wednesday in New York City.

Sean Combs sports a big grin during the TimesTalks Presents: An Evening with Sean "Diddy" Combs in N.Y.C. on Wednesday.

David Beckham teaches kids some soccer skills Wednesday in Seoul.

Chris Martin gets his sweat on while pedaling along the streets of Malibu, Calif. on Wednesday.

Chelsea Clinton takes the stage at the We Day New York event at N.Y.C.'s Madison Square Garden on Wednesday.

Andy Cohen does double duty — chatting on the phone while walking his dog, Wacha, in N.Y.C. on Wednesday.

Adrian Grenier talks about his Lonely Whale Foundation non-profit at a Wednesday Build event in N.Y.C.

Just days after revealing that she underwent a kidney transplant, Selena Gomez cuddles up with her dog in N.Y.C.

Karlie Kloss is all smiles as she catches a ride on a motorcycle after walking the runway at the Alberta Ferretti fashion show in Milan on Wednesday.

Margot Robbie (and a giant furry friend!) strikes a pose as she arrives at the London premiere of Goodbye, Christopher Robin on Wednesday.

Michael Peña stops by BUILD Studios on Wednesday in N.Y.C.

Ryan Gosling and Harrison Ford laugh it off during their Blade Runner 2049 photo call on Wednesday in Paris.

Selma Blair spends some quality time with her pup in Studio City, California.

Katy Perry and her squad of dancers perform during her "Witness: The Tour" show in Montreal on Tuesday.

Adriana Lima attends the American Beauty Star premiere at N.Y.C.'s Gramercy Terrace on Tuesday.

Mel B sports a sheer lace jumpsuit at America's Got Talent Season 12 Finale Week on Tuesday in Hollywood.

Fuller House stars Andrea Barber, Candace Cameron Bure and Jodie Sweetin have a girls night at Broadway's Dear Evan Hansen on Tuesday.

Emma Stone poses with tennis champ Bille Jean King, whom Stone portrays in Battle of the Sexes, at a special N.Y.C. screening of the film on Tuesday.

Pamela Anderson is all smiles as she arrives for an interview with Good Morning Britain on Wednesday in London.

Olivia Culpo brightens up her casual ensemble with pops of red while on her way to lunch in Beverly Hills on Tuesday.

Hillary Clinton waves to supporters as she leaves a taping of The Late Show with Stephen Colbert on Tuesday in New York City.

Beyoncé keeps it chic as she heads to catch a Broadway show with daughter Blue Ivy (not pictured) on Tuesday night.

World of Dance's Jenna Dewan Tatum and Derek Hough ham it up for the cameras as they arrive at NBC's celebration for the show on Tuesday in West Hollywood.

Mariah Carey and boyfriend Bryan Tanaka leave a romantic date night dinner at Dan Tana's restaurant in West Hollywood on Tuesday.

Usher strikes a pose at the end of a rainbow mural while out and about on L.A.'s Melrose Avenue on Tuesday.

Katharine McPhee hits a high note during her performance at the 2017 Grammy Museum Gala honoring David Foster on Tuesday in L.A.

Elsa Pataky gets playful with the cameras as she attends the Women'Secret campaign presentation on Tuesday in Madrid, Spain.

Rihanna is ready to celebrate as she attend the Fenty Beauty x Harvey Nichols Launch Event on Wednesday in London.

On Tuesday, Jaden Smith and girlfriend Odessa Adlon dress in their best for The Goalkeepers Global Goals Awards in N.Y.C.

Priyanka Chopra takes the stage at The Goalkeepers Global Goals Awards on Tuesday.

If we had to hand out an award for "Cutest Couple at the World of Dance Celebration," we would give it to Jennifer Lopez and Alex Rodriguez for their adorable red carpet appearance on Tuesday.

Emma Stone debuts platinum hair as she films scenes for her new Netflix series, Maniac, on Tuesday in Westchester, New York.

Selena Gomez totes bags on the N.Y.C. set of Woody Allen's upcoming movie.

In between college classes, Brooklyn Beckham is spotted out on his skateboard in N.Y.C.

Marilyn Manson and Adriana Lima get cozy as they stop by SiriusXM Studios in N.Y.C. on Tuesday.

It's a family affair! Bella and Gigi Hadid come together backstage at the Tommy Hilfiger show during London Fashion Week on Tuesday.

Olivia Munn sports a cropped sweater and turquoise pants in N.Y.C.

American Idol alumna Jordin Sparks surprises young leukemia survivors and their families at Burlington's Flagship New York City location as part of the store's 16th annual fundraising campaign with The Leukemia & Lymphoma Society.

Ashlee Simpson works on her fitness on Tuesday in L.A.

Adam Levine enjoys a game of golf with friends while in Rio de Janeiro, Brazil.

Demi Lovato strikes a pose with her dancers following a performance on The Tonight Show on Monday.

On Tuesday, Tony Bennett and Lucy Liu attend the American Theatre Wing Centennial Gala at Cipriani.

Also at the Centennial Gala: Orange Is the New Black's Lea DeLaria, who rocks out at the Tuesday night.

A smiling Kelly Rowland snacks on some fruit while out and about in L.A.

On Monday, Prime Minister of Luxembourg Xavier Bettel joins Paris Jackson onstage at the during Global Citizen Live! in N.Y.C.

On Monday, Kirsten Dunst tops her look off with baby's breath at the premiere of A24's Woodshock.

A bare-faced Elle Fanning keeps things casual during a shopping trip in New York City's Soho neighborhood.

Meg Ryan and John Mellencamp, who recently reconciled after breaking up three years ago, walk hand-in-hand in N.Y.C.

Emmy winners Laura Dern and Jean-Marc Valle are as happy as can be at the Canadian Consulate's Celebration for the Canadian Nominees of the 2017 Emmys.

Annie Lennox accepts the George Harrison Award from Harrison's wife Olivia during Global Citizen Live! on Monday.

A vest-clad Naomi Watts starts her day in N.Y.C. on a positive note.

Reese Witherspoon and her look-alike daughter, Ava, are total twins as they arrive at LAX Airport.

On Tuesday, Ryan Gosling greets photographers at a photo call for his film, Blade Runner.