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A close pal of Princess Diana has blasted Kate Middleton's mum for selling a Halloween costume of a princess covered in BLOOD.

The children's outfit, named 'Zombie Sleeping Princess' is on sale on Carole Middleton's Party Pieces website.

The white dress is covered in fake blood and shows the princess' ribcage and organs.

Simone Simmons, a psychic and friend of Diana who died in a car crash in 1997, told the Daily Star: “This is sicker than sick.

"I hope people boycott this site."

She branded it "warped and twisted" and accused the party company of "scraping the barrel".

(Image: partypieces.co.uk) (Image: PA)

The dress is on sale for £10.99.

A description of the product on the Party Pieces website says: "Our Zombie Sleeping Princess costume in pink includes a dress with chest print detail.

"This not so pretty princess costume features a blood-drenched pink silky dress with a jagged skirt.

"The top includes a gruesome print of the poor zombie princesses ribcage and organs.

"This princess will be the scariest princess at any Halloween party."

It is said not to be suitable for children under three years - and comes in two sizes: medium (age 7-9) and small (age 4-6).

(Image: partypieces.co.uk) (Image: partypieces.co.uk)

Editor in chief of Majesty magazine and royal author Ingrid Seward added: “This is in very poor taste.”

Carole's daughter Kate married Prince William in 2011 - and has been criticised in the past for 'cashing in' on her royal connections.

Earlie this year it promoted cake decorations and confetti ahead of Prince Harry and Meghan Markle's wedding.

The company has yet to comment on the controversy.