Country legends Willie Nelson, Hank Williams Jr., and Rascal Flatts have been confirmed as performers for the upcoming 2012 CMT Music Awards, scheduled for June 6th in Nashville.  The three veterans, along with Band Perry, will join previously announced acts including Carrie Underwood, Lady Antebellum, Kenny Chesney, Brad Paisley and others.  Underwood leads the pack in terms of nominations, with five, followed by Miranda Lambert with four and Taylor Swift and the Civil Wars, who are nominated three times each.