Girls Aloud was a British girl group formed in 2002 through the reality TV show Popstars: The Rivals. The group consisted of five members: Cheryl Cole, Nicola Roberts, Sarah Harding, Nadine Coyle, and Kimberley Walsh. They quickly gained popularity with their catchy pop songs and strong vocal performances. Over their career, Girls Aloud released several successful albums and singles, including hits like "Sound of the Underground" and "I'll Stand by You." They are known for their energetic performances and have won multiple awards, solidifying their place in British pop music history before disbanding in 2013.