When some artists reach a certain level of acclaim, the biters sometimes come out of the woodwork, echoing styles down to the adlibs.
Other times, a rapper is so influential that his impact can't help but inspire a few new stars, some of whom manage to transcend the influence.
And for some, it's more about marketing. Who wouldn't want to hear a female Snoop Dogg, or find out that Slick Rick's friend raps in a similarly bankable style?
Some of these artists have surreal similarities to the artists they emulate; others feel like natural complements. Either way, here's a partial history: Hip-Hop's Sonic Doppelgangers: 20 Rappers Who Sound Like Other Rappers
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