Tisdale joined the main cast of the Disney Channel series The Suite Life of Zack & Cody in 2005, and would continue to star in the show until 2008. The show proved to be a hit for the network, and earned Tisdale a Nickelodeon UK Kids' Choice Awards. Tisdale had her breakout role as Sharpay Evans in the Disney Channel film High School Musical (2006). The film was the network's most successful film of 2006, receiving 7.7 million viewers upon its premiere. The soundtrack for the film, featuring numerous contributions from Tisdale, went on to sell over three million copies in the United States alone. The song "What I've Been Looking For" (2006), a duet with Lucas Grabeel, became her first top 40 hit on the Billboard Hot 100, and was certified gold by the Recording Industry Association of America (RIAA). Tisdale, along with the rest of the cast, embarked on the High School Musical: The Concert (2006–2007) tour to promote the film. She met dancer Jared Murillo while working on High School Musical, and the two later dated for two years; they split up in 2009. During this time, Tisdale began appearing on soundtracks for the Disney Channel, and released a cover of "Kiss the Girl" (2006) to promote The Little Mermaid.
