He's been claiming for years that his lightened skin is the result of a rare medical condition.
But the secret behind Michael Jackson's skin 'problem' may have finally been discovered after a fan put his skin whitening cream on eBay.
The world's most prolific collector of Jacko memorabilia has put this and a number of other items - seized by the police as evidence after the singer was arrested on suspicion of child molestation - up for sale on the auction website.
The seller, whose username is 'vaccaro99' has put up a starting bid of $25,000 (£14,000) and in the item's description claims that a former employee of the singer, who authenticated the items, said Jackson, 50, would have cases of the cream to hand.
Also included in the sale is a letter explaining why Jackson wanted an annulment from Lisa Marie Presley, again with a starting bid of $25,000.
There is also a handwritten note from the star to his late sister-in-law Dee Dee which he penned during his four-month 2005 trial, which has a starting bid of $10,000 (£5,700), and a 'Do Not Disturb' door sign from Neverland - with a silhouette of a small boy sitting in a circle.
That is on sale for $5,000 (£2,850), the same price as a 'never-seen-before' photograph of Jacko with a young boy on his lap, both dressed as cowboys.
The seller does not say how he came by the items.