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Pearl Jam gathered Saturday for the premiere of director Cameron Crowe's documentary on the band, Pearl Jam Twenty, at the Toronto International Film Festival.

The film's companion book, also called Pearl Jam Twenty, will be published tomorrow. It features a foreword by Cameron Crowe as well new interviews about the group with Bruce Springsteen, Neil Young and Foo Fighters' Dave Grohl.

The soundtrack to Pearl Jam Twenty will be out on September 20th, and that night, the film will be screened in theaters around the country. It can also be seen on American Masters on PBS starting October 21st, with the DVD to follow soon after

Motley Crue guitarist Mick Mars has found another writing partner for his long-in-the-works debut solo album -- Marilyn Mason bassist Twiggy. Mars Tweeted that they were in the studio late Thursday.

Mars has been working on the album in between Crue tours for the past two years. There's no word on when he'll release it.

Ignore the rumors about AFI splitting up -- the band was a victim of a hacker. Someone broke into singer Davey Havock's account on AFI's message board and posted that the band was packing it in. But their management has posted a note on their Facebook page saying, "That's not Dave. The band haven't broken up. Someone is just screwing around." And AFI drummer Adam Carson Tweeted, "We would have totally written a better press release."

 In Stores Tomorrow:

Staind: Staind (Atlantic)
Aaron Lewis gets back to rock with his bandmates after releasing a country EP.

Bush: The Sea of Memories (Zuma Rock/eOne Music)
Gavin Rossdale has re-activated his band, which only features one other original member at this point.

Primus: Green Naugahyde (Prawn Song/ATO)
Les Claypool and company are back with their first album in 12 years.