The #1 song in the UK on April 16, 2011

On the Floor By Jennifer Lopezfeaturing Pitbull

Other #1 songs on April 16, 2011

#1 Hit Song

E.T.
Katy Perry featuring Kanye West

#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

Born This Way
Lady Gaga