DJ Earworm's Mashup of Billboard's Top 25 Songs of 2009
The Black Eyed Peas perform at the Gramm The Black Eyed Peas perform at the Grammy Nominations Concert Live where nominations for the 52 annual Grammy Awards were announced, at Club Nokia at LA Live in Los Angeles on December 2, 2009. The 52 annual Grammy Awards will take place on January 31, 2010. AFP PHOTO / Robyn Beck ROBYN BECK/AFP/Getty Images

While we can't take credit for commissioning DJ Earworm's massive mashup of Billboard's Top 25 songs of 2009, we're not immune to its artistry and eye for detail. Already an Internet sensation, DJ Earworm has made the pop potpourri an annual tradition, with equally clever combinations in 2008 and 2007. What a great way to ring in 2010.

Billboard's Best of 2009 Charts & Features

Photos of the Year


The Year in Music: Top 20 Moments

Hot 100 Songs of the Year

Billboard 200 Albums of the Year

Artists of the Year

Top 25 Tours

Critics' Picks: Best Albums of 2009

Readers Poll: Best Albums of 2009

Video: Artists' Favorites of the Year and Decade