Celebrity week in photos: Zoe Saldana, Liv Tyler, Heidi Klum and more

April 5: Lady Antebellum took the stage at the Capital One jam fest during the NCAA March Madness Music Festival in Indianapolis. Photo: Getty Images for Turner

April 4: Gabrielle Union cheered on Serena Williams during the Miami Open Women's Tennis Final Match in Key Biscayne, Florida. Photo: Getty Images

April 4: Rihanna made her way to Indianapolis to perform at the NCAA March Madness Music Festival presented by Turner Live Events. Photo: Getty Images for Turner

April 3: Kristen Stewart wore a Self-Portrait jumpsuit to a 'Clouds of Sils Maria' screening and Q&A at LACMA in L.A. Photo: Getty Images

April 2: Zoe Saldana and Marco Perego checked out the new Samsung Galaxy S6 during the launch in L.A. Photo: Getty Images

April 2: Possible Taraji P. Henson was sharing 'Empire' behind-the-scene secrets with Aaron Paul at the Samsung Galaxy S6 and S6 Edge launch in L.A.? Photo: Getty Images

April 2: Zoe and Marco were joined by Kate Bosworth and Michael Polish at the Samsung S6 party. Photo: Getty Images

April 2: Olivia Munn had fun with boyfriend Aaron Rodgers at the Samsung Galaxy party at Quixote Studios in L.A. Photo: Getty Images

April 2: Shanina Shaik, Karlie Kloss, Eli Mizrahi and a slew of supporters sweated it out for Maybelline's Emily DiDonato's Soul Cycle ride that benefited St. Jude Children's Research in NYC. Photo: Instagram

April 2: Laverne Cox and jewelry designer Alexis Bittar attended the LGBT Center's Annual Dinner at Cipriani 42nd Street in NYC. Photo: Getty Images

April 2: Jenna Dewan Tatum and Ciara were pretty in white for the FORWARD by Elyse Walker and David Koma dinner at Soho House in West Hollywood. Photo: Getty Images

April 2: Khloe Kardashian did a last minute touch-up at an ULTA Beauty appearance to promote the Kardashian Beauty Hair Care And Styling Line in West Hills, California. Photo: Getty Images

April 2: Kellie Pickler with husband Kyle Jacobs announced they will be starring in a reality show for CMT at the network's Upfront in NYC. Photo: Larry Busacca/Getty Images for CMT

April 2: The gang is back together (minus Howard, of course!): Howie Mandel, Heidi Klum, Nick Cannon and Mel B attended the 2015 NBCUniversal Summer Press Day for 'America's Got Talent' at The Langham Huntington Hotel and Spa in Pasadena, California. Photo: Gregg DeGuire/WireImage

April 1: Throw your hands up! Liv Tyler and boyfriend David Gardner left their son Sailor at home to take each of their kids to the New York Knicks vs. Brooklyn Nets game at Madison Square Garden. Photo: James Devaney/GC Images

April 1: Justin Long, Cody Simpson and Gigi Hadid looked on intently as the New York Knicks played the Brooklyn Nets at NYC's Madison Square Garden. Photo: James Devaney/GC Images

March 31: Rita Ora supported her boyfriend Richard Hilfiger's dad Tommy at the designer's Tommy Hilfiger Boutique opening in Paris. Photo: Getty Images

April 1: Katharine McPhee is "Just Fab" on the pink carpet for the company's apparel launch at the Sunset Tower in West Hollywood. Photo: Getty Images

March 31: Anna Camp and Elizabeth Banks joined Jamie Chung at the Los Angeles premiere of Hulu's 'Resident Advisors.' Photo: Gregg DeGuire/WireImage

March 31: Miriam Shor, Sutton Foster, Debi Mazar and Hilary Duff hit the premiere for their TV Land show 'Younger' at the Landmark Sunshine Cinema in NYC. Photo: Jim Spellman/WireImage

March 31: Meghan Trainor had a fun night out with some girlfriends at Omnia Nightclub in Las Vegas' Caesar's Palace. Photo: Al Powers of Powers Imagery LLC.

March 30: Rihanna with BFF Melissa Forde tried on hats at the Opening Ceremony 'M$$ X WT' Launch Event in New York City. Photo: Getty Images

March 27: Engaged couple Nikki Reed and Ian Somerhalder supported the Humane Society at their first Miami gala that was held at the St. Regis Bal Harbour. Photo: WorldRedEye.com Photo: