Zac Efron Puts A Bikini-Clad Ashley Tisdale Atop His Shoulders [PHOTOS]

We don’t know what Troy and Sharpay were up to yesterday, but we were totally down with whatevs.  The Fourth of July found Ashley Tisdale atop her High School Musical co-star Zac Efron’s shoulders at a party in Malibu.  Sporting a ∫ bikini and turquoise shades, Tisdale celebrated her 26th birthday looking as giddy as a school girl (wouldn’t you if you found yourself partying with Efron?).

PHOTOS: Hey Hey, Zac Efron’s Biceps

We’re assuming boyfriend Scott Speer was at the party, but Efron makes for a better photo op.