Kelly Brianne Clarkson (born April 24, 1982) is an American pop singer, songwriter, and occasional actress. Clarkson made her debut under RCA Records after she won the highly-publicized first season of the television series American Idol in 2002.

She was originally marketed as a pop musician with her debut album Thankful (2003). With the release of her multi-platinum second album, Breakaway (2004), Clarkson moved to a more rock-oriented style of music. Clarkson's third album, entitled My December, was released on June 26, 2007. According to Sony Music, Clarkson has sold over 20 million albums worldwide. Clarkson has had eight of her singles become Top ten hits on the Billboard Hot 100. Her first three albums sold over 9.5 million copies in the United States. In 2008, she joined VH1's list of 10 sexiest women of the new millennium at #8. She also hit #28 on Vh1's Top 30 Hottest Rock Front Women. As of 2008 she is one of the 10 most played artists on adult contemporary radio. Clarkson's fourth album titled All I Ever Wanted was released on March 10, 2009, and debuted at #1 on the Billboard 200. Her latest single, "My Life Would Suck Without You", advanced from No. 97 to No. 1 on the Hot 100 in its first week of release, breaking the record for the largest leap to the position in chart history. She is currently the only American Idol contestant to have reached number one in the UK. She claimed number one on March 1, 2009 when "My Life Would Suck Without You" debuted number one on downloads alone.

Clarkson has sold over 10,060,000 albums in the United States, becoming the highest-selling Idol winner. According to Nielsen SoundScan, Clarkson is also ranked on the top 200 album sellers of the Nielsen SoundScan era at number 187.