Best friends Vanessa Hudgens and Ashley Tisdale lounged in their bikinis on vacation in Mexico yesterday. The High School Musical costars joined another of their girls, Shelley Buckner, jetting off on a getaway south of the border on Saturday, and they wasted no time getting into the sun. Vanessa worked on her tan last month at Coachella, where she cuddled up with her new man. Vanessa Hudgens and Josh Hutcherson also enjoyed a PDA-filled date in LA last week, though he's also focusing on his upcoming transformation into Peeta to shoot The Hunger Games. Vanessa is on a break between projects at the moment, but she'll be getting back to set soon too as she reportedly signed on to star in indie drama Shelter with Brendan Fraser. First up, however, is soaking in the rays with Ashley, who finished work on season one of Hellcats and is yet to hear if it's renewed for number two.