So Far... was a song that contained a sample of the lead single from which other Eminem album?
So Far...: " as performed by Schooly D, as well as "The Real Slim Shady" and "I'm Back" by himself. The Real Slim Shady: "The Real Slim Shady" is a song by American rapper Eminem from his third album "The Marshall Mathers LP" (2000).
The Marshall Mathers LP