Why Wasn't Metallica Invited to the Obama Concert?

MSNBC talks about the feel-good vibes of politically-correct, eco-friendly rockstars jamming for Obama at a pre-inaug event:

"Despite the enormity of the task that lies ahead, I stand here today as hopeful as ever that the United States of America will endure — that it will prevail, that the dream of our founders will live on in our time," the president-elect said at the conclusion of a musical extravaganza that featured U2, Beyonce, Bruce Springsteen and a host of other stars.

Zzzz. I bet there was nary a beach ball nor a vixen flashing her tits at this event, despite the fact that Pro-Obama lefties are hailing this as a "New Woodstock". If only Metallica was there to play "Leper Messiah", that would've set a more truthful tone for the coming administration: