Thursday Afternoon Diversion: Mash Ups and A Capella

Okay, so the first video is six months old, but it's still badass. A mash-up of the top 25 songs of 2008? Girl Talk, eat your heart out. And after the jump, an A Capella version of one of our favorite songs so far this year performed by Acquire A Cappella of UC Santa Cruz (language NSFW, though, so keep the volume low).