"Thankful," the debut album from "American Idol" first season winner Kelly Clarkson, outsold new releases from 50 Cent, Fleetwood Mac, and Darryl Worley to bow on top of The Billboard 200. The RCA set sold 297,000 copies in the U.S., according to Nielsen SoundScan. While it's Clarkson's first album, the singer is no stranger to the summit of Billboard's charts, as her single "A Moment Like This" topped the Hot 100 last year, and has sold 617,000 copies to date.