Jack Johnson, Elvis Costello & The Attractions and Kasey Chambers have been added to Bluesfest 2013. Other new acts heading to Bluesfest are Passenger, Grace Potter & The Nocturnals, Trixie Whitley, The Soul Rebels, Clairy Browne & The Bangin’ Rackettes and the return of RockWiz Live. Bluesfest’s first two announcements included John Mayer, The Dave