I could waste a lot of time at TotallyLooksLike.com. No, wait, I already have. Some of the comparisons are astute (Billy Mays really does look like Al from Home Improvement!), some of them are funny, and some of them are just plain mean. You can make your own by using their archive of pictures, or upload your own finds. A couple that I thought were funny: Suge Knight totally looks like Uncle Phil from Fresh Prince of Bel Air, Rod Blagojevich totally looks like Lego Man, and Axl Rose totally looks like Pickles.
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My favorite was the Cowardly Lion looking like James Hetfield. So true!!
They both made of the same material.... plastic!
(and they have the same number of brain cells....)