Slash reports on his site that he has nine songs recorded with various vocalists and while Slash has refused to say who has participated on the songs, rumours abound with reports of Sebastian Bach, Alice Cooper , Lenny Kravitz, and Vince Neil as well as ex Guns N' Roses Duff McKagan and Izzy Stradlin.

According to Slash's wife during an interview with Rockerrazzi.com, both Ozzy Osbourne and Fergie will make appearances on Slash's upcoming solo album, saying, "It's going to be Slash and friends, with everyone from Ozzy to Fergie.(Black Eye Peas)" (quote from wiki)

Slash reports on his Blog:
"
By next Monday we will have 9 songs with vocals recorded. It really is a killer record so far & it sonically sounds amazing. We've recorded everything analog & that makes a huge difference in the most positive way. Eric Valentine is the perfect producer to handle all this spontaneous information & energy I've been throwing at him, he is really a one of a kind technician.

Its hard to explain, but I really needed this creative outlet to do stuff I haven't been at liberty to do in a LONG while. To be honest, I have been having a ridiculously good time working on this project.

And, the singers have all been genuinely awe inspiring & a pleasure to work with. They are the focus of what this record ultimately will sound like, regardless of how good the instruments sound. With their input, every session has had its own unique vibe & character & the songs have developed a personality unique to each individual vocalist, cool stuff.

Unfortunately, this record is not going to come out until next year, but its going to be worth the wait, I promise. "

Muscians also part of Slash's 'solo project' are Nine Inch Nails Josh Freese on drums and the former Jane’s Addiction Chris Chaney on bass