The pop princess with a massive voice racks up some monster hits

Blessed with the extraordinary, multi-octave pipes of an R&B diva, Ariana Grande had already dropped two chart-topping albums by the age of 21. Sure, sometimes she's gotten a boost from friends like Zedd and Iggy Azalea, but Grande's charm really shines on her solo cuts. Check out the soulful ballads and dance-floor bangers that made her a pop phenomenon.