7. “Already Gone” – Kelly Clarkson
The third single off Clarkson’s album All I Ever Wanted ended up being certified Gold in two countries despite the feud that ensued due to similarities with No. 4 on this list, which escalated to the point of Clarkson trying to get the track removed from her album. The breakup song sold over 2 million copies in the USA and charted in four continents.