An American actress, singer, and producer, she worked in over one hundred advertisements and had minor roles in television and theatre until she achieved mainstream success as Maddie Fitzpatrick in the Disney Channel series The Suite Life of Zack & Cody.
This success was heightened when she starred as Sharpay Evans in the High School Musical franchise. The film series proved to be a huge success for Disney and earned a large following. The success of the films led to Tisdale signing with Warner Bros. Records, releasing her debut album, Headstrong (2007), through the label. The album was a commercial success, earning a gold certification from the Recording Industry Association of America (RIAA). She starred as Candace Flynn in the animated series Phineas & Ferb from 2007 to 2015.