FILE - In this Jan. 31, 2012 file photo, musician Dave Grohl poses for a portrait in Los Angeles. The often eloquent Foo Fighters frontman has signed on to give the keynote speech at the 2013 South By Southwest Music Conference on March 14 in Austin, Texas. He's also working on his Sound City documentary and new Queens Of The Stone Age material with Josh Homme. Both are expected to be early released early next year. (AP Photo/Matt Sayles, file)
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