8 Beck
11 ZZ Ward
12 a-ha
13 Shawn Mendes
15 Leona Lewis
18 Taylor Swift
19 Echosmith
20 Nate Ruess
22 Simply Red
24 Hozier
25 Pentatonix
26 Maroon 5
27 Rob Thomas
28 Daya
29 Karmin
30 Oh Honey
31 Andy Grammer
33 Mika
34 P!nk
37 Muse
38 Mika