The #1 R&B song on June 9, 2009

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

Other #1 songs on June 9, 2009

#1 Hit Song

Boom Boom Pow
The Black Eyed Peas

UK #1 Song

Boom Boom Pow
The Black Eyed Peas

#1 Country Song

Then
Brad Paisley

#1 Alternative Hit

Know Your Enemy
Green Day

#1 Dance Track

I'm Not Getting Enough
Ono