Beautiful Disease is an unreleased solo album by Guns N' Roses bassist Duff McKagan which was slated to be released as his second solo album in 1999. However, it was shelved after a merger between McKagan's parent label Polygram and Universal, and McKagan lost the rights to release it.

Michael Andrew "Duff" McKagan is an American musician. He was the bassist of hard rock band Guns N' Roses for twelve years, with whom he achieved worldwide success in the late 1980s and early 1990s. McKagan rejoined the band in 2016, following their induction into the Rock and Roll Hall of Fame.