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 at number four on the UK Singles Chart. In March 2007, Girls Aloud collaborated with fellow British girl group Sugababes for the cover of the song "Walk This Way" by Aerosmith. Billed as "Sugababes vs. Girls Aloud", the song served as the official single for "Comic Relief" which became the group's third number one. In May 2007, Girls Aloud embarked on their third tour, . Girls Aloud released their fourth studio album, "Tangled Up", in November 2007. The first single from the album, "Sexy! No No No..." peaked at number-five on the UK Singles Chart. The second single, "Call the