You can't help but laugh when you watch these hilarious bloopers from Justin Timberlake [1]'s appearance on The Tonight Show on Sunday. Hours after his buzzy halftime performance [2], JT joined Jimmy Fallon [3] for The Tonight Show's special Super Bowl episode. The pair teamed up for a hilarious "Songversation" segment, which involved them breaking into song as they attempted to chat. In the final clip, which you can watch ahead, both Justin and Jimmy manage to keep a straight face — but behind the scenes, they couldn't quite keep it together. Check out the funny blooper reel above, then see how the internet reacted to Justin's halftime performance [4].