Complex sentence: The song was certified Platinum in the U.S on September 17,2008, with over 1,000,000 digital downloads, and in December 2010 the song topped the 2 million mark in paid downloads.
Split into simpler sentences: The song was certified Platinum in the U.S on September 17,2008, with over 1,000,000 digital downloads. In December 2010 the song topped the two million mark in paid downloads.