A great moment in late night television occurred last night when Jimmy Fallon invited his real-life pal Joseph Gordon-Levitt to partake in a little karaoke. But it's not just any old karaoke. Instead, we're treated to a special edition of "Since U Been Gone" and "Edge Of Glory," sung in the style of Axl Rose (JGL) and David Bowie (Fallon). Actually, I guess those songs ARE any old karaoke. But better.