Katy Perry has threatened legal action against media outlets if anyone publishes paparazzi shots taken of the singer inside her own home.

The Firework hitmaker took to Twitter.com on Saturday (07Feb15), on the eve of the Grammy Awards, to blast the snappers hiding out near her California home amid allegations they were using high tech equipment to snoop on the pop star and her relatives.

She went on to warn bloggers and tabloid editors to ignore any unauthorised images, or face her wrath.

In a pair of tweets, she wrote, "Remember internet it's literally Illegal to post pictures of me at my house w/ (with) my family that unethical paparazzi have taken on long lenses.

"Any distribution or purchase of these type of photos anywhere is extremely against my will & is an endangerment to me & my family's privacy."

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