Don't get the wrong idea about Zac Efron's PDA with a bikini-sporting Ashley Tisdale. Despite dozens of paparazzi pics of the pair playing in the surf, doing the piggyback thing (left) and generally looking snuggly at the starlet's 26th birthday celebration Saturday in Malibu, it was all very much platonic. That's according to Tisdale, who took to Twitter to announce her warm, sibling-y feelings for her "High School Musical" co-star.
"So happy Zacary made it to my party!!!" she tweeted. "He's my brother/best friend!!!"
Echoes an insider to Us Weekly, "They are like brother and sister. They were just palling around, having fun. He would never think of her like that."
Besides, in between her hijinks with Efron, Ashley cozied up to longtime boyfriend Scott Speer, whose presence she noted in subsequent tweets.
"Don't believe all pictures. People r gonna come up with stuff to say bc it sells!" Tisdale explained. "I had such a great birthday party with my friends, family, and BOYFRIEND Scott. I will not let stupid rumors ruin all the fun we had!"