2 Beck
10 Maroon 5
11 a-ha
12 Echosmith
13 Pentatonix
14 Jess Glynne
16 Daya
18 Karmin
19 Sia
21 P!nk
22 Andy Grammer
23 John Newman
24 Mika
25 Adele
27 DNCE
29 Taylor Swift
31 ZZ Ward
35 Olly Murs
38 Simply Red
39 Hozier
40 Taylor Swift