Celebrity Star Tracks: Monday, March 22, 2010 By People Staff Published on March 22, 2010 05:00 PM Share Tweet Pin Email Trending Videos 01 of 15 TEACHER APPRECIATION Giovanni/Splash News Online Cameron Diaz is happy to get work Sunday on the set of Bad Teacher in downtown Los Angeles. The blonde beauty stars in the comedy alongside ex-beau Justin Timberlake. 02 of 15 BIRTHDAY GIRL ISM/Stefan/Flynet Reese Witherspoon gets a jump-start on her birthday celebration Saturday – she turns 34 on March 22 – enjoying a weekend getaway with beau Jim Toth in Ojai, Calif. 03 of 15 SLAYING IT Byron Purvis/AdMedia Gerard Butler gets animated Sunday for the Los Angeles premiere of How to Train Your Dragon. The Scottish actor lends his voice to the animated 3D flick, which hits theaters March 26. 04 of 15 GOOD TASTE! Juan Soliz/Pacific Coast News Something looks finger-lickin' good! Gwen Stefani keeps her little taste tester Zuma, 19 months, close to the hip Sunday during a pool party with hubby Gavin Rossdale and son Kingston (not pictured), in Palm Springs, Calif. 05 of 15 L.A. INK Josephine Santos/Pacific Coast News After attending an Alice in Wonderland premiere party together last month, Avril Lavigne and ex-husband Deryck Whibley continue hanging tight Sunday at a tattoo parlor in West Hollywood, Calif. 06 of 15 STAYING IN STEP Ramey Coordinated couple Katy Perry and Russell Brand take a hike – literally! – through L.A.'s Griffith Park on Sunday. Days before, Perry visited the set of Sesame Street to film a guest appearance. 07 of 15 MARATHON MAN Valerie Macon/Getty He made it! Shia LaBeouf shows off his medal and races to a triumphant finish in Santa Monica, Calif., Sunday after running the Los Angeles Marathon. 08 of 15 COOL IT! Brian Prahl/Splash News Online Kim Kardashian flaunts her hot bikini body and enjoys a refreshing beverage while relaxing on a yacht in sunny Miami Saturday with sister Kourtney. 09 of 15 SHAPE OF HER HEART Jesse Grant/WireImage Heidi Klum gets to the heart of the matter – family! – at the Diet Coke-sponsored Heart Truth Pop-Up Experience in Santa Monica, Calif., on Friday. 10 of 15 CRUISE CONTROL INF Don't let the broken glass fool you! A well-coiffed Angelina Jolie has everything under control Friday while shooting scenes for The Tourist in Venice, Italy. 11 of 15 MIDDLE MAN Ray Tamarra Please pass the…props! Host Russell Simmons has his hands full Thursday chatting with Salt-n-Pepa at the Gold Rush Awards, an event honoring contributors to the arts, in New York. 12 of 15 MOST WANTED Alex Oliveira/Startraks Breaking Bad stars Aaron Paul and Bryan Cranston mug for the cameras in New York's Times Square Friday, the final stop of the show's RV tour to promote its March 21st premiere. 13 of 15 FLY GIRL PA Photos /Landov After rushing to husband David's side earlier this week, Victoria Beckham goes solo at London's Heathrow Airport on Friday. 14 of 15 STUCK ON YOU Seth Browarnik/Startraks Erik Estrada and Verne Troyer give two thumbs up at the SWAGG cafe during Austin's SXSW music festival on Friday. Earlier in the week, the rock steadies teamed up with the Starkey Hearing Foundation to promote hearing health. 15 of 15 CLEAR MESSSAGE Flynet A love-hate relationship with boys? Ashley Tisdale lets her T-shirt do the talking Friday in West Hollywood, Calif. Earlier in the day, the actress announced she's landed a role on the upcoming CW series Hellcats.