Katy B, Anna Calvi and Tom Odell also added to bill for June festival
19 Recordings claim artists including Kelly Clarkson and Carrie Underwood have been underpaid
Fans will be able to watch all of the action as it happens on NME.com via desktop, tablet and mobile on February 26 2014
Radio 1 DJ joins Emma Willis and Jack Whitehall on list of names to follow James Corden
The Scottish singer collapsed onstage in Lisbon
The slump follows last year's high of 6.5 million viewers
BBC Radio One DJ admits he'd 'love' to present next year's event