The #1 R&B song on September 15, 2011

I'm On One By DJ Khaled featuring Drake, Rick Ross & Lil Wayne

Other #1 songs on September 15, 2011

#1 Hit Song

Someone Like You
Adele

UK #1 Song

All About Tonight
Pixie Lott

#1 Country Song

Barefoot Blue Jean Night
Jake Owen

#1 Alternative Hit

Walk
Foo Fighters

#1 Dance Track

Talking to the Universe
Ono