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