PowerShell 194 189 164

"{0}{1}{2}. Yes, {0}{3}{2}.`nAll you other {1}{2}s are just imitating.`nSo, won't {3}{1}{2} p{4}?`nP{4}. P{4}."-f"I'm ","Slim ","Shady","the real ","lease stand up"

Somehow my answer ened up resembling @nneonneo's a lot, even though it wasn't my original intent...