1 of 19 Hozier
2 of 19 Ariana Grande
3 of 19 Backstreet Boys
4 of 19 Weezer
5 of 19 Picture This
6 of 19 Kelly Clarkson
7 of 19 Avril Lavigne
8 of 19 LSD
9 of 19 William Prince
10 of 19 AJR
11 of 19 Dan + Shay
12 of 19 Daughtry
13 of 19 Kesha
14 of 19 Rozzi
15 of 19 5 Seconds of Summer
16 of 19 Niall Horan
17 of 19 Grace VanderWaal
18 of 19 BTS
19 of 19 Selena Gomez