The new acts join previously announced headliners Baker Boy and Middle Kids
The inaugural three-day event will take to NSW’s Sapphire Coast in September
Joined by Josh Pyke, Thelma Plum, Little Quirks, Abbe May and Siobhan Cotchin
Roach said listening to the new version gives him "goosebumps"
The collaboration marks the first time the singers have performed together
The premiere of the show's third season will air at 5.30pm this Sunday
The live-streamed show took place last December
The two new shows join dates in Hobart, Fremantle, the Hunter Valley and Wollongong
His debut solo album 'Cycles' arrived today
The inaugural festival is taking place in Hobart next year