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 to break the group in the Australian market. "Whole Lotta History", the fourth and final single to be taken from "Chemistry", was released in March 2006 and charted at number six. In 2005, Girls Aloud filmed a one-off documentary entitled "" for ITV2. The success of the show later made way for "", a six-part fly on the wall documentary series for E4. Girls Aloud then appeared in an episode of "Ghosthunting with..." (without Nadine) towards the end of 2006, in which Yvette Fielding guided them through haunted locations. In May 2006, Girls Aloud embarked on their first arena tour,