Following a debacle in Serbia that some are calling the worst concert ever (it's not a stretch), Amy Winehouse is calling off her summer European tour.

She clearly can't hang, so this is 100 percent for the best.

It's never a good sign when you get up on a stage in Belgrade, Serbia and shout "Hello Athens!" Or when you need to rest on a speaker. Or need a backup singer to pinch-hit and belt out lead vocals because you can't.

And so on. Whatever her reason for canceling, Amy, who is fresh out of rehab (clearly it worked wonders), has postponed the dates indefinitely.

Don't hold your breath for a makeup date.

[Photo: Pacific Coast News]