Lindsay Lohan Disrupts Lily Allen's Cover of Britney Spears

Welcome to the wild and wonderful world of Bizarre Celebrity Behavior. Watch this recently-released video capturing none other than recently-jilted Lindsey Lohan as she spontaneously joins Lily Allen on stage.

Let the hilarity begin as LiLo tries to offer her rendition of Britney Spears' hit “Womanizer.”