Kelly Clarkson has returned to the top of the U.S. pop charts a week after she was dethroned by Katy Perry.
 
Perry became only the 20th act to debut at number one when her "Part of Me" crashed in at the top, but now she swaps places with Clarkson and falls to four as the "American Idol" star reclaims the peak position on the Billboard Hot 100 with "Stronger (What Doesn't Kill You)."
 
Adele's "Set Fire to the Rain" holds at two on the new countdown, while British boyband The Wanted rocket into the top three at three with "Glad You Came."