Star Tracks: Monday, March 22, 2010

01 of 15

TEACHER APPRECIATION

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

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

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!

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

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

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

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!

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

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

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

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

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

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

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

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.