Slash has started working on his solo album. The former Guns N’ Roses guitarist promises many guest appearances on his new set but is tightlipped about who it might be, though it’s rumored Ozzy Osbourne and Fergie are among those who will appear on the album. What is known is who will back up Slash on the record. Drummer Josh Freese, who played with GN’R from 1997 to 2000, and Jane’s Addiction bassist Chris Chaney will both be in Slash’s band. No word yet on when the disc will hit shelves.