Slash spent more time dealing with bureaucracy than recording for his new album.

The former Guns 'N' Roses guitarist assembled an all-star cast for his first solo effort, 'Slash', but says although it meant a lot of hassle from record companies, it was worth it because he got to play with his heroes.

He said: "It took four months to make the record. I had to write all the material then I had to make demos to send to all singers.

"Then the thing that made it take the longest was getting releases from all the different artists' record companies."

He added that he found hanging out with some of his boyhood heroes - such as Ozzy Osbourne and Lemmy Kilmister of Motorhead - was "a trip".

He added: "Sitting next to Ozzy while he's writing lyrics and practicing the vocal is really a f***ing trip. I've been listening to Ozzy since I was like 13 years old."

The album - due for release in April - also features Iggy Pop, Kid Rock, Maroon 5 singer Adam Levine and Black Eyed Peas' vocalist Fergie.

Slash added to Rolling Stone magazine: "I think people are gonna trip when they hear the stuff Fergie is capable of.

"I really wanted to do something with her so people could hear what her rock chops are like."