2009 Summer Song

"I Got A Feeling” Black Eyed Peas

The song spent fourteen consecutive weeks at #1 making it the longest-running #1 single of the year. It won the Grammy for Best Pop Performance by a Duo or Group with Vocals and became the first song in digital history to sell over 7 million digital copies in the US. Produced by David Guetta, and along with Boom Boom Pow (their previous song), they ruled the charts for seventeen weeks.

List from Insider.com