Nadine Coyle weekly Saturday night live performances (alternating weekly between the girls and boys). Following her performance of "Fields of Gold", Walsh told her she gave the "performance of the night. Stole the show for me," while fellow judge Halliwell said, "I'd love to buy a single of yours already". Coyle joined Cheryl Tweedy, Sarah Harding, 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
Chemistry (Girls Aloud album) on 2 December 2005 and in the United Kingdom on the following Monday. In addition to the standard edition of the album, a limited edition with a bonus disc was also released. The bonus disc contains Christmas music, including covers and original songs produced by Xenomania under the moniker Festiv Gifts. The songwriters also took on Christmas-related pseudonyms. In Australia and New Zealand, the album was released on 20 February 2006; however, it failed to generate much interest. Additionally, "Chemistry" and other Girls Aloud releases appeared on the US iTunes Store on 26 June 2007. The album's first single was