20.
Nickelback "Never Gonna Be Alone" [Debut]
19.
Rob Thomas “Someday” [Debut]
18.
Boys Like Girls ft Taylor Swift "Two Is Better Than One" [+2] [2,18]
17.
Florance & the Machine "Drumming Songs" [+2] [3,17]
16.
Allison Iraheta "Friday I'll Be Over U" [-6] [11,1]
15.
Owl City "Fireflies" [-4] [11,1]
14.
Lights "Ice" [+3] [3,14]
13.
Adam Lambert "For Your Entertainment" [=] [8,13]
12.
Lifehouse "Halfway Gone" [+3] [4,12]
11.
P!nk "I Don't Believe You" [+3] [5,11]
10.
Jessie James "My Cowboy" [+3] [5,10]
9.
The Script "Breakeven" [-3] [11,4]
8.
Michael Buble "Haven't Met You Yet" [-4] [11,1]
7.
Taylor Swift "Fifteen" [+1] [7,7]
6.
Orianthi "According To You" [+3] [7,6]
5.
Paramore “Brick By Boring Brick“ [=] [8,1]
4.
Flyleaf "Beautiful Bride" [+3] [8,4]
3.
Muse "Undisclosed Desires" [-1] [10,2]
2.
Carrie Underwood "Cowboy Casanova" [+1] [7,2]
1.
Rise Against "Saviour" [=] [9,1]
Number 1s
Allison Iraheta "Friday I'll Be Over U" (3x)
Bon Jovi "We Weren't Born To Follow"
Owl City "Fireflies"
Paramore "Brick By Boring Brick" (2x)
Michael Bublé “Haven’t Met You Yet”
Rise Against "Savior" (3x)
Sneak Peak at up coming debuts
Brandi Carlile “Dreams”
30 Seconds to Mars "Kings and Queens"
Shakira ft. Lil' Wayne"Give It Up To Me"
Angel Taylor “Just Like You”
Verdera “Satisfy”
Leona Lewis “I See You”
Also thanks to everyone who commented.