People.com Celebrity Star Tracks: Monday, December 30, 2013 Simpson and beau Evan Ross look oh-so-chic on a walk through West Hollywood. Plus: Heidi Klum, Jonah Hill & more! By People Staff Updated on January 21, 2022 04:37 PM Share Tweet Pin Email 01 of 25 ROCK STEADY WENN Ashlee Simpson keeps in step with boyfriend Evan Ross on a day out in West Hollywood on Sunday. 02 of 25 SHORTS STORY FameFlynet Robert Downey Jr. happily hits the beach Sunday while holidaying with wife Susan and 22-month-old son Exton (not pictured) in St. Barts. 03 of 25 STICK TO THE SCRIPT X17online Does Josh Duhamel have a new movie in the works? The actor gets going in L.A. on Sunday with reading material in hand. 04 of 25 EASY DOES IT Headlinephoto/Splash News Online On-the-go mom-to-be Gwen Stefani squeezes in some much-deserved relaxation as she stops by an L.A. acupuncture clinic on Saturday. 05 of 25 WALK THIS WAY FameFlynet Heidi Klum pops in coordinated turquoise New Balance workout gear (from her own line) on a walk with boyfriend Martin Kirsten and their dog in Santa Monica, Calif., on Saturday. 06 of 25 LIFT OFF StarSurf/Splash News Online New Girl's Max Greenfield holds tight to the leading lady of his life – daughter Lily – while soaking up the sun with family in Hawaii on Sunday. 07 of 25 OUT & ABOUT Pacific Coast News Jonah Hill, who's receiving rave reviews for his role in The Wolf of Wall Street, enjoys a sunny afternoon in L.A. on Sunday with a female friend in tow. 08 of 25 ROW YOUR BOAT Splash News Online Coming through! Don Cheadle takes to the water during a family vacation in Hawaii on Sunday. 09 of 25 DAPPER DUO AKM-GSI It's only been about a week since she welcomed son Kaius, but Rachel Zoe is already showing off her slender post-baby body Sunday in Bel-Air, Calif., with her first son Skyler, 2½, by her side. 10 of 25 THE PURPLE ONE Kevin Mazur/WireImage for NPG Records 2013 Looks like he's gonna party like it's 1999! Prince brings down the house during what was surely a legendary performance at the Mohegan Sun Arena in Montville, Conn., on Sunday night. 11 of 25 WET & WILD Splash News Online Getting ready to hang ten? Sean Penn gets sandy on his way to catch a wave on a sunny Sunday in Hawaii. 12 of 25 BABY, IT'S HOT OUTSIDE Clasos.com/Splash News Online Jennifer Aniston and fiancé Justin Theroux bring some serious heat to Los Cabos, Mexico, where they soak up the sun on Saturday. 13 of 25 GOOD TO GO Pacific Coast News Naya Rivera and fiancé Big Sean stay on the move – and close to each other – as they make their way through L.A. on Saturday. 14 of 25 BACK TO WORK Ian Nolan/Splash News Online It's no sweat for Gisele Bündchen, who clocks in a post-holiday workout in Boston on Saturday. 15 of 25 JOY RIDE Ramey Rihanna makes waves in Barbados as she cools off in style on Saturday. 16 of 25 'MAD' ABOUT YOU Bryan Steffy/WireImage It's date night in Las Vegas for Olivia Munn and boyfriend Joel Kinnaman, who hit Beacher's Madhouse on Saturday after its Miley-unveiled opening. 17 of 25 Eva's New Man All Access Photo/Splash News Online Eva Longoria steps out with her new beau, television executive Jose Antonio Baston, while shopping Friday in West Hollywood, Calif. 18 of 25 Miley's Madhouse Ethan Miller/Getty It was a busy night in Las Vegas on Friday! Miley Cyrus catches Britney Spears's new show and hits the opening of Beacher's Madhouse at the MGM Grand Hotel/Casino. 19 of 25 Hoop-La-La James Devaney/WireImage Recently single Miranda Kerr goes really casual in a T-shirt and ripped jeans to a New York Knicks game at Madison Square Garden on Friday. 20 of 25 SAND LAND Splash News Online What's not to smile about when you're at the beach? Isla Fisher gathers some water to help build a sand castle on Friday while on a family trip in Hawaii with husband Sacha Baron Cohen and daughters Olive, 5, and Elula, 3. 21 of 25 ROLLING ALONG Pacific Coast News Keri Russell makes a solo grocery run on Friday in New York City, just days after she was spotted out with her The Americans costar and possible new beau Matthew Rhys. 22 of 25 CUTE AS A BUNNY AKM-GSI Like, mother, like daughter! Jessica Alba arrives at Los Angeles International Airport with her equally beautiful little one Haven, 2, bundled in her arms on Friday. 23 of 25 IT'S RAINING MEN AKM-GSI Getting a little damp won't stop him! Matthew McConaughey takes a break from daddy duty for a rainy run in Belo Horizonte, Brazil, on Friday morning. 24 of 25 FUEL UP BroadImage Need a hand, Khloé? The newly single Kardashian sis dons workout gear while juggling iced teas in Calabasas, Calif., on Friday. 25 of 25 LADIES FIRST Matt Agudo/INF Alec Baldwin does the stroller pushing while wife Hilaria smooches the forehead of their daughter Carmen, 4 months, on a coffee run in Amagansett, New York, on Thursday.