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 Will the Neighbours Say? Live", which took place in May 2005. The group also released its first DVD, "Girls on Film". Following their first tour, Girls Aloud began work on their third studio album, "Chemistry". The album peaked on the UK Albums Charts at number eleven and received platinum certification. The first single from the album, "Long Hot Summer" was released in August 2005. The single ended Girls Aloud's run of top five singles when it charted at number seven. The follow-up single from the album, "Biology" was released in November 2005. The song was critically acclaimed; Peter Cashmore of