STUPIIIIIIID [legit in tears]! A lip sync battles means nothing, unless you have Kevin Hart, Will Ferrell and Jimmy Fallon in on it. During The Tonight Show Starring Jimmy Fallon, the three funny men go head-to-head in a two-round lip sync battle. Let’s just say, if you thought John Legend performed the heck out of his “All of Me” single, wait until you get a look at Kevin Hart put on a show with the track as back-up. Classic funny. Check out the lip sync battle down bottom.