I was tipped off about this track on The World Forgot and as Billy points out the track is taken from DJ Hero. It's not a cover and it's not really a mash-up as such. Well not in my mind, Mash-ups for me are two songs that are laid over each other whereas this track mixes the two songs together, scratching at time. It works REALLY well.
and that brings to the end the last playlist for this year. To finish off your playlist you just need to add the Wild Palms, Mansfield Holiday and thenewno2 and that should keep you entertained for a while.