Girls Aloud by Louis Walsh until 2005 when Hilary Shaw replaced him. The new group competed with the boys' winning group, One True Voice to have 2002's Christmas number one single. Girls Aloud won the battle with their single "Sound of the Underground", produced by Brian Higgins and Xenomania. The song spent four consecutive weeks at number one and was certified platinum in March 2003. The song received critical acclaim; Alexis Petridis of "The Guardian" stated that "it proved a first: it was a reality pop record that didn't make you want to do physical harm to everyone involved in its manufacture".
Girls Aloud movie, "St Trinian's". They also made a cameo appearance in the film as the school band. The was released on 10 December 2007, and the video for "Theme to St. Trinian's" premiered in December 2007. In November 2008, Girls Aloud released their fifth studio album and would be their final studio album "Out of Control", which entered the UK Albums Chart at number one and became their most successful studio album to date, being certified double platinum. The album's lead single, "The Promise", became the group's fourth number one on the UK Singles Chart. The single also returned the group