Def Leppard Fallon
Hhe'll be joining them for the entire show - Kings Of Leon are the music guests.
Collen was recently featured on "L.A Ink," where he and new bride Helen Simmons each got their first tattoos this spring, prior to their wedding in July; the two met on Leppard's 2008 "Sparkle Lounge" tour. - more on this story
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