When Jimmy Fallon and Joseph Gordon-Levitt were hanging out and having fun, drinking and singing karaoke, Fallon discovered an amazing gift that Gordon-Levitt has. So he decided to share that gift with all of us on 'Late Night' (Weeknights, 12:37AM ET on NBC).

According to Fallon, Gordon-Levitt does the absolute best impression of Axl Rose. But why limit him to singing Guns N' Roses songs, when there's a whole cornucopia of musical sounds out there the great Axl Rose could sing. So he randomized the selection.

And then suddenly we were witness a thing of bizarre glory. Joseph Gordon-Levitt as Axl Rose singing Kelly Clarkson's 'Since U Been Gone.' And he did do a great impression. And that song sounded kind of awesome sung like that.