Double bill: returning to the Festival after a 28-year absence, tough-tender American rocker Melissa Etheridge rolls in with classics from her tremendous career and tracks from Memphis Rock & Soul (2016), drawn from the immortal Stax catalogue. Then, buckle up for the powerhouse vocals and dizzying charisma of British soul singer Joss Stone, taking the stage with the heady songs of her 7th album, Water For Your Soul.