Popstars The Rivals was a British television talent show series that was broadcast on ITV in late 2002. It was the second UK series of the international Popstars franchise. Unlike Popstars, which resulted in the formation of one winning group – Hear'Say – Popstars: The Rivals created two rival groups, Girls Aloud and One True Voice, who competed against each other for the Christmas Number One spot on the UK Singles Chart.

Popstars The Rivals aired on ITV on Saturday nights from 7 September 2002, beginning with three pre-recorded episodes of preliminary audition rounds, before switching to live broadcasts of studio performances. During the rounds of live show, viewers voted for their favourite performers by telephone and the Red Button on digital television remote controls. In the final weeks, five females and five males were chosen by the British public to form the two groups, boy band] One True Voice, and girl group Girls Aloud. The final episode of Popstars: The Rivals aired live on 22 December 2002. During the broadcast, Pepsi Chart Show presenter Neil Fox revealed in a live link-up that "Sound of the Underground" recorded by Girls Aloud had reached Number one on the Singles Chart, thereby becoming the Christmas Number One. One True Voice's double A-side single, "Sacred Trust/After You're Gone" entered the chart at Number Two.