Justin Bieber Survives South Park but Can't Escape Cleveland Unharmed

Singer dings up knee performing in Cleveland last night, still finishes show

It's the Biebs' knee!

Justin Bieber injured his knee last night while performing a concert in Cleveland. But while he was visibly hobbled, gimpinga around the stage, the cutie crooner soldiered on like the pro he is.

So how bad is it? Here's what the Biebs' rep tells E! News...

"Justin was seen limping on stage last night, however, he finished his set. We are hoping it's just a bad sprain," says the rep.

Another source in the Bieber camp says the 16-year-old star retreated to his tour bus immediately after the show ended to nurse his injury.

Last time Bieber was dinged up in concert he wound up fracturing his right foot, landing in a cast.

"I tripped over something on stage coming down the ramp and felt my ankle roll in a very bad way," he tweeted at the time. "Turns out I fractured my foot and had to finish the song on a broken foot. After I was done I was in such pain I skipped the encore and got off stage and back to see the medics."

Still it beats getting killed on South Park, right?

Speedy recovery, Justin. And maybe it's time to beef up that concert insurance.