Let's just say I've got some bad news, some good news, and some really bad news...
Bad news: Dave Matthews Band and John Mayer will headline this festival.
Good News: Tom Petty will also headline. You also get to see moe., The Black Crowes, Rodrigo y Gabriela, Steve Winwood, The Roots, Leftover Salmon, Tea Leaf Green, JJ Grey & Mofro, and Grace Potter & the Nocturnals.
The Mile High Music Festival will take place July 19-20 outside Denver, CO. Tickets go on sale March 29. More information can be found here.
Really bad news: this is unrelated, but is guaranteed to make you gag.