I have always been impressed by high-quality song mash-ups. The likes of Party Ben and the Bootie crew are incredibly creative in my opinion. But kids these days are reeeeeally blowing me away with VIDEO mash-ups. What will the kids do next? Give a kid a Mac and they’ll flip your original content into something arguably more amazing (considering their production budget was ZERO). If you have never seen one, the audio for two or more songs are mixed and played over a mix of multiple video sources – typically the videos for the songs. I have pulled some of the better examples, one of which I found during my Eric B and Rakim search just minutes ago.
UPDATE: See the comments on this post from the founders of Bootie for more info on their contributions to this phenomenon! And definitely add their blog to your reading list. It is the THE source for the best mash-ups out there. They make one excellent point that is important to note… quite often the mash-up videos you may encounter were not created by the same person that created the audio mash-up. Just a little FYI!
Eric B and Rakim + Beastie Boys
Kanye + Linkin Park (Note that the video content was lifted straight from TRL!)
Kanye + Maroon 5
Gorillaz + Killers
50 Cent + Eninem + Linkin Park
Justin Timberlake + Corey Hart