Best-selling download single in the USA

Best-selling download single in the USA
Who
Flo Rida
What
4400000 unit(s) sold
Where
United States
When
December 2008

"Low" by rappers Flo-Rida and T-Pain (both USA), which topped the chart in December 2007, had sold over 4.4 million downloads in the US by December 2008.