Posted on Sun Jul 3, 2011 11:42 AM PDT
Ashley Tisdale partied with her High School Musical co-star Zac Efron Saturday in Malibu, celebrating her 26th birthday (she's only a year older than Lindsay!).
Body language experts might say that these two looked like a little more than friends as Ash had her legs wrapped around her BFF Vanessa Hudgen's ex-boyfriend's neck. Hmm ... wonder what 'Nessa thinks about these pix!
Oh, and check out Ashley's birthday dance below ...
If you were Vanessa, would you be upset?
SEE THE GALLERY Ashley Tisdale Celebrates B'day With Zac Efron
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