Release History
Region | Date | Format |
---|---|---|
United States | April 7, 2009 | Rhythmic and urban airplay |
April 14, 2009 | Mainstream airplay | |
United Kingdom | May 4, 2009 | Digital download |
June 22, 2009 | CD single | |
Brazil | September 9, 2009 | Digital download |
Read more about this topic: Knock You Down
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