A new report has identified which songs and movies were most downloaded via peer-to-peer (P2P) file-sharing networks in 2007.

Wired News used data from BigChampagne Online Media Measurement to determine the most popular legal and illegal downloads of the year.

The news agency asked BigChampagne to concentrate solely on P2P traffic from sites like BitTorrent, Gnutella and eDonkey.

It was revealed that Party Like A Rock Star by rap group Shop Boyz was the most popular song that people downloaded in 2007. Other hits include Akon's I Wanna Luv U, Sean Kingston's Beautiful Girls and Soulja Boy's Crank Dat Soulja Boy.

BigChampagne co-founder Eric Garland explained that artists who had seen their songs downloaded extensively had not necessarily enjoyed strong album sales.

"If Soulja Boy and Shop Boyz would have sold as many CDs as they did singles, they'd be household names," he explained.

"They'd be superstars on par with 50 Cent and Kanye West."

Popular illegal movie downloads included Resident Evil: Extinction, Superbad, Beowulf and Transformers.