I'm not a huge fan of hip-hop, nor do I listen to a great deal of mash-ups's, but I was convinced to check out Girl Talk's latest album, which can be downloaded free in a Radiohead-like "Pay what you want" deal. The album flawlessly mashes together dozens of samples in each song, creating a wholly new creation blending together classic rock, pop and hip-hop and it's just so fun to listen to. See a list of samples used in each song
here, and download the album
here.