Hip-Hop's Most Unlikely Collaborations

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yesterday's news that Raekwon, Kanye West and Justin Bieber may be entering the studiotogether, it conjured up all the good, bad and terrible decisions emcees have made in the past when venturing outside their comfort zone. Some, like Run-D.M.C. and Aerosmith's 'Walk This Way' are undeniable, groundbreaking works, while others involve the Beach Boys fake-scratching turntables in the middle of Times Square.

Rappers talk about collaborations all the time that never materialize, so we're going to err on the side of that Chef/Yeezy/Bieb track never happening. Still, it's a good excuse to look back at some of rap's strangest meet-ups.