Fergie: Imma Be ... Fallin' Down Hard!
Fergie gave one hell of a painful performance at a concert in Kansas City this week when she slipped on stage at a show and came crashing down hard on her knees.
![](https://imagez.tmz.com/image/5b/16by9/2011/12/17/5b8defe4f7b35bb4b66dab06f479c153_md.jpg)
Gotta hand it to the Black Eyed Peas singer though -- she popped right back up and continued to rock out like nothing happened.