She became known as Maddie on Disney's The Suite Life of Zack and Cody, and released the gold-certified album Headstrong in 2007. She won five awards, including an MTV Movie Award, for her performances in the High School Musical series. She also voices the character Candace on Phineas and Ferb.
She met her current manager at age three, and he landed her over 100 roles in commercials as a child actress.
She played the antagonist in the High School Musical films, and was ranked #10 in Maxim's Hot 100 list in 2008.
When she was 12 years old, she was invited to sing at the White House for President Bill Clinton.