X-Factor's Nicole Scherzinger -- Creepiest Marriage Proposal Ever

Marriage proposals are sweet, right? Well not when some random dude invades your space while you're trying to tape "X-Factor."

As Nicole Scherzinger sat at the judge's table during a taping break, a Hungarian dude who was in the audience bolted toward her, got down on one knee and ... we'll she didn't say yes.

Security removed him from the CBS lot.