Nothing like a celebrity cameo!
Anna Kendrick took on John Krasinski on Thursday's episode of "Lip Sync Battle," showing off her skills while performing Jennifer Lopez's hit, "Booty."
Sporting a sexy black jumpsuit, the actress got the crowd on their feet with her sultry dance moves and wind-blown 'do, thanks to a perfectly placed fan.
The "Pitch Perfect 2" star called in the big guns, surprising her competitor with an appearance from J.Lo herself!
Sporting a figure-hugging white and gold dress, the pop star strutted out on the stage and stood booty-to-booty with Anna.
Needless to say, Anna beat Krasinski in the end, despite the fact that the actor dressed in drag to perform Tina Turner!
Check out the hilarious clips above -- wait until you see Chrissy Teigen's priceless reaction when she sees Jennifer.
