Eminem, 50 Cent, Vanilla Ice are good examples of this style. But let's be honest, in "today's day's" we can find alot of rappers to copycat.
http://allhiphop.com/
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How to do this style:
-Get a cap.
-A necklace chain.
-Some nice hip hop shoes like nike air force.
-If you like you can dress your pants a little lower than normal.