*NSYNC Definitely Performing at VMAs ... Probably

8/25/2013 12:53 AM PDT BY TMZ STAFF
It's happening ... it's really, really happening ... *NSYNC is reuniting on the VMA stage -- this according to the band's official Twitter.

It's kind of ironic ... Twitter didn't even exist when *NSYNC was famous -- but that didn't stop the boy band from all-but-confirming their HIGHLY anticipated MTV performance in 140 characters or less, writing, "mic check, mic check one ... two ... is this thing on?!"

So unless they just like screwing with people ... it's soooooo on.