The #1 R&B song on June 19, 2009

Knock You Down By Keri Hilson featuring Kanye West and Ne-Yo

Other #1 songs on June 19, 2009

#1 Hit Song

Boom Boom Pow
The Black Eyed Peas

UK #1 Song

Mama Do (Uh Oh, Uh Oh)
Pixie Lott

#1 Country Song

Then
Brad Paisley

#1 Alternative Hit

New Divide
Linkin Park

#1 Dance Track

When Love Takes Over
David Guetta featuring Kelly Rowland