A spokesman for Ariana Grande told MailOnline photos that claim to show her are fake.
If you are going to take photos, use a service like Snapchat.
Do these techniques guarantee that naked photos I share with a partner won't be published online? In 2006, users of 4chan and other websites 'raided' American white nationalist Hal Turner by launching multiple attacks and prank calling his phone-in radio show.
Information about the vulnerability was on August 30, a day before the photos first appeared online.
But the sheer number of names on the list makes this unlikely — unless a large number of hackers were taking part, and a large number of celebrities had poor password management.
In August 2016, 28-year-old Edward Majerczyk of Chicago, agreed to plead guilty to a similar phishing scheme, although authorities believe he worked independently and he was not accused of selling the images or posting them online.
Some of the women named as alleged victims - but who have not had any of their supposedly nude photographs leaked - include Aubrey Plaza, Candice Swanepoel, Cara Delevingne, Cat Deeley, Hillary Duff, Kelly Brook, Michelle Keegan, Selena Gomez, Rihanna, Vanessa Hudgens and Farrah Abraham.
Approximately 500 collections of private photos of various celebrities leak on the internet.