The most magical thing I've heard in a while:

Yeah, I said it. Wu-Tang Clan vs. The Beatles. 27 glorious tracks of it, in fact, collected in Enter the Magical Mystery Chambers. So far it utterly pwns The Grey Album, but maybe I just like Wu-Tang better than I like Jay-Z. Your mileage may vary. Special thanks to Kay Thaney, she of Science Commons fame, for recommending this.