3 Beck
5 a-ha
10 Nate Ruess
11 Leona Lewis
14 John Newman
15 Echosmith
18 Maroon 5
20 Pentatonix
21 Daya
22 ZZ Ward
23 Karmin
25 P!nk
26 Sia
28 Andy Grammer
29 Mika
30 Simply Red
31 Taylor Swift
33 Hozier
35 DNCE
36 Rob Thomas
38 Oh Honey
40 Muse