I always check out Jimmy Kimmel's music mash up on his show. Every week it's another fun duo that should NEVER be on the same stage together. Check Warren G. and Kenny G. getting down together for the first time.
Imagine the top songs of 2012 all smushed together in a pleasing fashion... That's what this mash up is. It's pure sonic goodness! I especially like what they did to Adam Levine and One Direction's voices:)