Madonna's new album has leaked online before even being announced.

Pop legend Madonna has been recording music for her 13th studio album for the past year but an unfinished version of the LP has now surfaced online with the tentative title, 'Iconic'.

Madonna's 13th album has been leaked online in an unfinished state before it has even been announced.

The 56-year-old had not yet confirmed the album, but it was widely speculated the collection would be released next year when she is reported to be heading out on a world tour to celebrate the 30 year anniversary of her ground-breaking 'Like a Virgin' concert series.

The already leaked tune 'Rebel Heart', produced by Avicii, features on the 13-track LP, alongside previously confirmed songs 'Bitch I'm Madonna', 'Joan of Arc' and 'Make the Devil Pray'.

Other tracks on the surfaced record include Nicki Minaj collaboration 'Unapologetic Bitch' and a second song with Avicii titled 'Wash All Over Me'.

Elsewhere in the collection there are tracks titled 'Addicted (The One That Got Away)', 'Borrowed Time', 'Heartbreak City', 'Illuminati', 'Living For Love (Carry On)', 'Messiah', and 'Revolution'.

The security breach is not the first time music from the 'Hung Up' hitmaker has prematurely appeared online, as 'Rebel Heart' was leaked last month prompting her manager Guy Oseary to put out a plea for information about who released the track.

Posting on Twitter, he wrote: "I would be grateful to any @madonna fans that can assist us in finding those responsible for the leak. We appreciate your help... (sic)"

After discovering her privacy had been compromised with the release of 'Rebel Heart', the mother-of-four posted an image of a smashed MP3 player on her Instagram account alongside a furious comment in which she said the leak has caused her to have a "broken heart."

She wrote: "This broken ipod is a symbol of my broken heart! That my music has been stolen and leaked! I have been violated as a human and an artist! #f**kedupshit (sic)"

Earlier this year, OneRepublic frontman Ryan Tedder announced he has been working with the hitmaker on the follow-up to 2012's 'MDNA', describing the music as "her best stuff in more than a decade".

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