Iommi revealed the idea started as a joke
The veteran singer will appear at London's Hyde Park on July 13
Veteran crooner also says he's keen to do a second series of 'The Voice'
Singer will return for series two - so long as he can approve the other coaches
Welsh crooner takes a dig at Simon Cowell's show ahead of live finals this weekend (April 29)
The track is taken from the Welsh crooner's forthcoming album 'Spirit In The Room'
'Spirit In The Room' will also feature versions of songs by Paul McCartney, Paul Simon and Odetta
The singer is set to be a judge on BBC1's 'The Voice'
The Welsh crooner puts cancelled Monte Carlo gig down to dehydration
Welsh singer set for special guest appearance on Big Top stage
Acts set for Union Chapel shows this November
Singer set to play Union Chapel in London
Welsh singer is currently ahead of his closest rival by 500 sales
Welsh singer says he'd like to hook up with 'Recovery' rapper
'We share a Las Vegas connection', singer tells NME
Fans turned away from midnight gig in the woods
'Sex Bomb' singer angry about record company executive's alleged remarks
Plus Steve Mason and I Blame Coco join the bill
'Praise And Blame' set for July release
Veteran singer is told to rest after falling ill