Jack Black, that kid in your chemistry class who doesn't know how to handle his false-2000s nostalgia, is an emo. You can tell from his name. Self-explanatory. You can also tell from his music choices. Alizée (he's an American.), One Republic (their best work was in 2013, IMO.), and Goo Goo Dolls (Just what? Someone has no clue how decades work.).