The 'High School Musical
' co-stars reunited at a swanky beach house and frolicked in the ocean together. Zac even gave Ashley a piggy back ride! But, while the pair looked like they were a little more than friends, the singer/actress made sure to diffuse rumors with a tweet.
"So happy zacary made it to my party!!!" she wrote
on July 2. "He's my brother/best friend!!!" Ashley's boyfriend, Scott Speer, was also at the celebration, so the smooch you see Zac giving the birthday girl was all out of platonic love.
Ashley got ready for the event with a pre-party Temptu spray tan, and kept the beach party theme going with a huge birthday cake with a bikini on it. Sounds like she had a great time!
Check out more photos from the event here
, thanks to our friends at Just Jared Jr.