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
Pop star defends her description: 'There is a person, or a group of people that were essentially terrorising me'
Hear lead single 'Living For Love' now
The singer's latest LP is reportedly called 'Iconic' or 'Unapologetic Bitch'
Two tracks from artist's forthcoming album appeared online in November