I am going to try to limit my mashup posts to once a week, but for the first week I’m going to be sporadically throwing up a bunch of what I consider to be classic mashups, just to get you all caught up on the mashup genre if you aren’t a big fan. If you like what you hear check out the /r/mashups subreddit.
“We Are Coming Undone” by iosine
Taylor Swift’s “We are never ever ever getting back together” vs Korn’s “Coming Undone”
“Oh No” by Girltalk
Black Sabbath, Jay-Z, Ludacris, NWA, Jane’s Addiction, and David Banner ft. Chris Brown
(Girltalk is great at doing intricate arrangements like this with a million different tracks at once)
“Rugrats theme vs Kanye West vs Jay Z Gold Digger 99 Problems Mashup”
“Eminem vs Bob the Builder” by ???
Various Eminem Songs vs Bob the Builder Theme
(I don’t know who did this. Some sites cite Weird Al, but there is no way he did this. The mashup is way too messy and amateur for that. Great mashup, lots of fun, but it lacks the technical polish that Weird Al would give it)