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Tool's Maynard James Keenan is throwing himself a 50th birthday party next year. 

The frontman has announced plans to host his so-called "Cinquanta" at the Greek Theater in Los Angeles on May 10th.  He's also set to provide the entertainment in the form of his various non-Tool bands like A Perfect Circle and Puscifer. 

Keenan also managed to book recently-reunited rockers Failure, who he says joined the lineup as a birthday gift. 

Tickets for Keenan's milestone celebration go on sale this Friday. 

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