Kelly Rowland ‘Stunned’ By Britney Spears Singing ‘X Factor USA’ Contestant

Kelly Rowland has heard some great singing on "X Factor USA" thus far, but a recent audition left her a little stunned and speechless because it was just that bad.

In a new teaser for the upcoming third season of "X Factor USA," Kelly and Simon Cowell react to a guy that decides to sing a Britney Spears song. Surprisingly, their reactions are different. Will Kelly give him a pass or will it be Simon that says it was good?

"X Factor USA" premieres this September on FOX.