"People may say 'this guy’s a fascist' but you can take positivity from watching him," says retired boxer
Singer expressed gratitiude and called leak an 'invasion into my life'
The six demo tracks from 'Rebel Heart' were leaked in December
'Iconic' will feature on Madonna's forthcoming album 'Rebel Heart'
Singer denies that a song she made named after the group is admission of her membership
Ariana Grande and Ed Sheeran will also perform at Los Angeles ceremony on February 8
Singer said that she is "not comparing" herself to anyone
The leak is the latest in a series of demos that have recently surfaced
The latest tracks to appear are said to be taken from the singer's thirteenth album 'Rebel Heart'
14 demos from upcoming album 'Rebel Heart' leaked earlier this month