Justin Bieber
Biebs went down hard during a pick-up game Friday in Cincinnati ... and came out of it with a severely swollen ankle.
He says it's sprained, which means 18,000 or so Beliebers are collectively holding their breath since Justin's supposed to perform tonight at US Bank Arena.
They can all suck air again. Justin says he's going to have to take it easy on stage, but promises he's "still gonna crush."
Someone get Axl Rose on the horn, stat!
