Death at Azealia being on there. And out of those only Meghan, Ari, and Iggy should be considered so bye. Lorde is kne too the wave hasn't found the others, but they're coming
It'll be interesting to see who's still her in 5 yeas. My money's on Ariana Grande and Meghan Trainor to be the biggest and most successful.
Well, Nick released his first album 10 years ago so I wouldn't count him out either. He's talented and always finds the way to be back in the spotlight.