Early demos of Madonna's new album have reportedly been leaked - and she's not one bit happy.

The pop icon took to Instagram to vent her fury about the album's leak, which is set for release in 2015 and reportedly titled 'Iconic' or 'Unapologetic Bitch'.

"This is artistic rape!!," the post said. "These are early leaked demo's half of which wont even make it on my album the other half have changed and evolved. This is a form of terrorism. Wtf!!!! Why do people want to destroy artistic process??? Why steal? Why not give me the opportunity to finish and give you my very best?".

Earlier this month, she had responded to the leak of album track 'Wash All Over Me' by saying that she had "been violated as a human and an artist!". Earlier in the week, she also claimed that old, previously unreleased photographs of her had also been stolen and sold.

The full leaked tracklisting is below:

'Unapologetic Bitch'
'Bitch I'm Madonna'
'Addicted (The One That Got Away)'
'Borrowed Time'
'Heartbreak City'
'Joan Of Arc'
'Living 4 Love (Carry On)'
'Make The Devil Pray'
'Rebel Heart'
'Wash All Over Me'