Sarah Harding participating in weekly Saturday night live performances (alternating weekly between the girls and boys). Each week the contestant polling the fewest phone votes was eliminated, until the final line-ups of the groups emerged. Harding joined Nadine Coyle, Cheryl Tweedy, Nicola Roberts, and Kimberley Walsh to comprise the new girl group Girls Aloud, formed through the show by a public vote on 30 November 2002. The group's debut single "Sound of the Underground" peaked at number one on the UK Singles Chart, becoming the 2002 Christmas number one. Girls Aloud hold the record for the shortest time between formation and reaching
Girls Aloud songs inspired by 1980s electropop, while also exploring retro styles. "The Promise" is a 1960s Spector-influenced number, while "Rolling Back the Rivers in Time" was compared to Burt Bacharach. Girls Aloud were one of the few pop acts to achieve continued success and longevity throughout the mid-2000s while R&B and rock music became more popular. In a review for the group's 2008 Tangled Up Tour, David Pollock of "The Independent" noted that "Girls Aloud remain confidently the only pop show in town." "The Times" stated, "Not since Abba and Michael Jackson has pure pop been so unanimously praised." Girls Aloud's