What happens when Chris Pratt and Jimmy Fallon [1] switch up the lyrics to some of your favorite songs? We found out on Friday when Chris joined Jimmy for a round of "Nonsense Karaoke" [2] on The Tonight Show Starring Jimmy Fallon. While their lyrics and Chris's singing voice are guaranteed to make you laugh out loud, the actor's dance moves might leave you thirsty for more. Check out the performances in the video, above, and then hear the cute story Chris shared about his son [3].