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".
The Sound of Girls Aloud: The Greatest Hits "singing and dancing glamorously". "I Think We're Alone Now" was chosen as the second and final single from the album, being released on 18 December. The song peaked at number four on the UK Singles Chart during Christmas week. The music video was directed by Alex Hemming and Nick Collett, and portrays Girls Aloud in an attempt to rob a Las Vegas casino. In 2007, Girls Aloud went on a tour to further promote the album. The announcement of the tour and the recording of their fourth studio album helped to stop rumours that the band were splitting up, which