It's finally official, latest Smashing Pumpkins drummer is no longer a part of Billy Corgan's frequently shifting lineup of supporting players.  Billy tells "Music Radar" that "like Elvis," Mike Byrne has "left the building."  The Pumpkins leader didn't offer any other details about Byrne's exit, only confirming the previously reported news that Motley Crue's Tommy Lee is the drummer on the band's upcoming album, "Monuments to an Elegy."  Byrne first joined the Smashing Pumpkins in 2010 at just 19-years-old.  He played on their multi-EP project "Teargarden by Kaleidyscope" and the 2012 album "Oceania." Something tells us that if Mike has been able to put up with Billy Corgan for the last couple of years, he won't have any problem finding another gig.

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