Grammy-winning rapper Eminem‘s The Slim Shady LP did more than just sell a few million copies. Marshall Mathers’ longtime manager Paul Rosenberg has credited Slim’s debut LP for changing his life.

Last night, Rosenberg hit up Instagram to geek out over the 1999 album’s impact on his career.

Heading into the weekend, both Eminem and Detroit native Royce Da 5’9 reflected on the LP’s 20-year anniversary.