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
The Promise (Girls Aloud song) the planet". As soon as Girls Aloud heard the song, they decided it should be the first single from "Out of Control". The day before the song was due to be delivered to Fascination Records, the entire backing track was ditched and replayed. Described by the band's website as a "stormer of a track", "The Promise" premièred on Switch on BBC Radio 1 on 14 September 2008. During promotion, Girls Aloud announced dates for 2009's Out of Control Tour. The song was released as a physical CD single in Ireland on 15 October 2008, followed by a digital release in