Popstars The Rivals (often stylised as Popstars: The Rivals) is an interactive reality, talent show broadcast in the United Kingdom during the autumn of 2002. It is the second series of the British Popstars franchise. Unlike the first series of Popstars, which resulted in the formation of one winning pop group – Hear’Say – Popstars The Rivals created two rival groups who competed against each other for the Christmas Number One spot on the UK Singles Chart.

Popstars The Rivals aired on ITV1 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, the all-male One True Voice, and Girls Aloud, an all-female group. 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.

The series is hosted by Davina McCall, with the performances judged by Pete Waterman, Louis Walsh and Geri Haliwell. In addition to the main show, Popstars The Rivals: Extra aired on ITV2, presented by pop star Dane Bowers and Pop Idol finalist Hayley Evetts.