Justin Bieber might be busy planning his wedding to Hailey Baldwin, but that doesn't mean he doesn't have time for a little bit of fun. On Thursday, Jimmy Fallon shared a video in which he and the 24-year-old singer surprised unsuspecting New Yorkers by lip syncing and dancing to "What Do You Mean?" while in disguise — and the result is absolutely hilarious. From playing the pan flute to showing their best dance moves, Fallon and Bieber visibly had a great time filming the musical photobomb in Central Park, and we would be lying if we said we hadn't already watched it a couple of times. See what the funny duo got up to in the video above.