Ashley Tisdale Gets Cozy With Zac Efron: Is She Betraying Vanessa Hudgens?

This weekend, the former co-stars in the “High School Musical” Ashley Tisdale celebrated her 26th birthday on the beach with her long-time friend the 23-year-old actor Zac Efron. She celebrate her birthday along with the 4th of July weekend in Malibu, Calif., on Saturday July 02, 2011.

“So happy zacary made it to my party!” Tisdale, who sported a striped Mara Hoffman bikini, Tweeted. “He’s my brother/best friend!” The actress and singer, who donned a striped Mara Hoffman bikini, 26-year-old Ashley Tisdale and her long-time friend the 23-year-old actor Zac Efron first spotted frolicking on the beach together.

26-year-old the former co-stars in the “High School Musical” Ashley Tisdale was surrounded by tons of family and friends including Samantha Droke, Robbie Jones, Zac Efron, Carlos Pena, Heather Hemmens and Matt Barr, Just Jared reports.

According to the Just Jared, Jennifer, the elder sister of Ashley Tisdale, mom Lisa and niece Mikayla were also spotted enjoying the party. VISIT ALSO Vanessa Hudgens Leaked Photos 2011: