The #1 song on April 18, 2011

E.T. By Katy Perry featuring Kanye West

Other #1 songs on April 18, 2011

UK #1 Song

Party Rock Anthem
LMFAO featuring Lauren Bennett and GoonRock

#1 R&B Song

Look at Me Now
Chris Brown featuring Lil Wayne & Busta Rhymes

#1 Country Song

Colder Weather
Zac Brown Band

#1 Alternative Hit

Rope
Foo Fighters

#1 Dance Track

E.T.
Katy Perry