Chance the Rapper, Jay Z and Common are gonna attract a new generation to Woodstock 50 and anyone who's not down with that better get the hell over it ... STAT!!!
Michael Lang -- the co-creator of Woodstock's 50th anniversary festival -- tells TMZ ... he heard about the backlash the festival has received in response to the lineup it released last week. Fans bitched it's too pop and modern, with artists like Miley Cyrus,Imagine DragonsandHalsey.
The backlash was intense. One person tweeted, "The Woodstock 50 lineup looks like it was curated by someone who's only exposure to music has been through the Grammy's 'Best Rock Performance' category between 2010-2013."