Kelly Clarkson & Bruno Mars Rock ‘The X Factor’ UK Stage

Kelly Clarkson and Bruno Mars both hit up last night’s UK results show of The X Factor, and each gave a unique performance. The American Idol alum belted out her current single “Mr. Know It All”, and was backed by drum team Extreme Rhythm. “I just had such a fun time on X Factor in London!!” Clarkson tweeted afterward. “Thank you to all of the ‘Extreme Rhythm’ drummers, my band, and the production team!” Meanwhile, Bruno and his band were decked out in matching reds suits for a rowdy performance of “Runaway Baby”. During an interview for the Xtra Factor segment of the show following her performance, Kelly discussed her intimate showcase for 500 fans at Los Angeles club the Troubadour last week.

“We just did this showcase in L.A.,” she said, when asked if she ever gets nervous before walking on stage. “I don’t think I was nervous, though. I was just really anxious. We’ve been dying to get this album out… We were performing new songs in this showcase.”

Kelly Clarkson — “Mr. Know It All” on The X Factor

Kelly Clarkson’s interview on The Xtra Factor

Bruno Mars — “Runaway Baby” on The X Factor