I think I can blame this mashup for my addiction. Gateway Mashup. From http://djearworm.com/category/frontpage/page/2
DJ Earworm - No One Takes Your Freedom (Scissor Sisters v. Beatles v. George Michael v. Aretha Franklin)
A mashup classic. From http://www.bootieusa.com/bestofbootie2007/
Cameron Adams makes a 46 minute mix of 139 songs. A mashup of everything from The Chemical Brothers to The Cure, Stone Roses to Snoop Dogg, and Fake Blood to Pharrell.