A law firm used by A-list stars has been hacked.
The website for Grubman Shire Meiselas & Sacks is down and hackers claim to have 756 gigabytes of data including contracts and personal emails.
A screenshot allegedly of a Madonna contract has been released, and the criminals are demanding payment.
The New York law firm says it has notified its clients and is working with cyber-security experts.
It's not known what sum the hackers are demanding and whether the law firm is negotiating with them.
The law firm said in a press statement that they can confirm that they have been victimised by a cyber-attack. They say they have notified their clients and staff adding they have hired the world's experts who specialise in this area, and they are working around the clock to address these matters.
The company's website is displaying just a logo but historic records of the site show a client list of more than 200 high profile people and companies.
Musicians include Sir Elton John, Barbra Streisand, Barry Manilow, Rod Stewart, Lady Gaga, Lil Nas X, The Weekend, Madonna, U2 and Drake.
Other clients named are Andrew Lloyd Webber, Priyanka Chopra, Robert De Niro, Sofia Vergara, Activision, Inc, Sony Corp, LeBron James and Mike Tyson.
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