2. DJEarworm We Need a Filthy War (Fischerspooner, Scissor Sisters, Chemical Brothers, Pet Shop Boys, Edwin Starr, Culture Club)

San Francisco's DJ Earworm typically goes further than your simple Song A + Song B mash, often combining elements from multiple sources. This delectable dance confection is no exception and, honestly, it was hard to choose which of his compositions to include in this list. Definitely an artist to keep your ear on.

1. Party Ben Boulevard of Broken Songs (Green Day vs Oasis)

It was a no-brainer that somebody had to do. Green Day's Boulevard of Broken Dreams has the same guitar chords as Wonderwall (by Oasis) and the rest, as they say, is revisionist history. The combination of melodic punk, bombastic brit-pop and snippets of overblown arena rock (courtesy of Aerosmith) are seamlessly edited together here. Reportedly, the website first hosting this mash-up was shut down after receiving a cease and desist order from Green Day's label, Warner Records. (The website returned online soon after, without the music.)

The shutdown, and ensuing protest by the online mash-up community - with over 149,000 participating Web sites, contributed to international press coverage beyond the music industry.

But the final word on this song, and the enduring popularity of the bastard pop genre itself, goes to Green Day's Billie Joe Armstrong, who was quoted on MTV Radio as saying, "Actually, I was driving in my car, and I heard a Green Day mashup, with, um, Oasis and Aerosmith. It sounded cool!"

Now if only all pop music could sound this cool. In that case, I might start listening to the radio again.