MOVE over Ozzy Osbourne, there's a new blood-sucking shock jock in town and her name is Ke$ha.

But unlike the Prince of Darkness, the 24-year-old Californian hasn't sunk her teeth into a live animal - yet.

While she's known for her trashy on-stage antics and expletive-laden monologues, the Tik Tok singer still managed to shock punters at Sydney's Future Music Festival at the weekend when she drank blood from a heart - to the song Cannibal, of course.

The potty-mouthed pop princess held the heart like a goon bag over her mouth, letting the blood ooze across her face and down her chest on the main stage at Royal Randwick Racecourse.

Covered in glitter and draped in a shredded American flag T-shirt, Kesha Rose Sebert performed much of her 45-minute set dripping in blood.

Ke$ha's publicist did not return calls yesterday, but the pop star is no stranger to Lady Gaga-style shock and awe on-stage antics.

Her high energy live shows, loaded with as much sexual innuendo as her song lyrics, are inspired by pop predecessors Madonna and Britney Spears and feature six-foot penis costumes, revealing rhinestone-coated outfits and lots of glitter.

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