A MASSIVE amount of celebrity nudes hit the web over the weekend . . . including Jennifer Lawrence, Kate Upton, Selena Gomez, Hilary Duff, Kirsten Dunst, and Lea Michele.

Apparently someone hacked into the Apple iCloud, and stole photos people had taken on their phones and backed up online.  And there's word that there could be MORE.

There were multiple photos of both Jennifer Lawrence and Kate Upton, and they each basically admitted they were real.  Jennifer's rep said, quote, "The authorities have been contacted and will prosecute anyone who posts the stolen photos."

And Kate's attorney said, quote, "We intend to pursue anyone disseminating or duplicating these illegally obtained images to the fullest extent possible."  And Kirsten Dunst, Tweeted, quote, "Thank you iCloud."

But Ariana Grande and Victoria Justice both claimed that the pictures of them that leaked are FAKE.

A TON of other celebrities had their private photos hacked and posted, including Kim Kardashian, Rihanna, Mary-Kate Olsen, Mary Elizabeth Winstead, Hope Solo, Krysten Ritter, Hilary Duff, Kaley Cuoco, Selena Gomez, McKayla Maroney, Aubrey Plaza and Lea Michele.

The FBI released a statement yesterday saying, quote, "[We are] aware of the allegations concerning computer intrusions and the unlawful release of material involving high profile individuals, and [are] addressing the matter."

Apple is investigating too.  As of last night, the photos were pretty scarce.  But you can find some, if not all of them, by digging around the Web, especially on sites like Reddit and 4chan.  But BE CAREFUL.  You WILL see pornographic images on those sites.

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