5 Seconds of Summer
Forget Iggy Azalea. While the aforementioned Aussie rapper is killing it in America, 5 Seconds of Summer are taking over the rest of the world. With boy bands back in fashion thanks to One Direction and the Wanted, it seems that every nation is eager to produce their own blockbuster quintet. So far, Australia is winning: 5 Seconds of Summer have not only gained star status in their native country, they're also enjoying major success throughout Europe and South America, where they served as opening act on One Direction's Where We Are tour. Now, the fivesome are showing signs of invading America: Their debut self-titled LP arrives via Capitol on July 22nd, but their singles "She Looks So Perfect" and "Don't Stop" have already penetrated the Billboard Hot 100 (and they turned out a memorable performance at the Billboard Awards). It won't be long before these guys aren't fit for this list.