Vanessa Hudgens is Threatened by Ali Lohan By Allie | March 9, 2008 Vanessa Hudgens is said to be worried that the presence of Lindsay Lohan’s 14-year-old sister Ali Lohan on-set of High School Musical 3 will cause unprecedented drama – and maybe even steal her thunder. “When Vanessa heard that Ali was vying for a part in High School Musical 3, she flipped. She knows Ali isn’t Lindsay, but she’s still weary of the drama the Lohan clan brings.” High School Musical 3: Senior Year, is