How Easy Is It to Hack A Celebrity?

How easy is it to hack into a celebrity's cell phone like Jennifer Lawrence and Kate Upton? It turns out it's disturbingly easy.

The hackers apparently got in by resetting the stars' passwords. Usually this involves answering a security question like, 'what is your mother's maiden name?' or 'what's your home town?' Information about the celebrities that is easily found online.

For example, on Jennifer Lawrence's Wikipedia page, her mother's maiden name is right there, Koch.

And Kate Upton's online biography lists her home town, St. Joseph, Michigan.

Apple uses personal information like that to verify the identity of somebody trying to reset his or her password. 

Security expert Kurt Knutsson told INSIDE EDITION, "Celebrities have it really tough because all of their information is already out there. The kinds of things like your mother's middle name and your middle name and your dog's name. Everybody knows everything about celebrities, so they can't use those."

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Knutsson says celebrities should use information only they would know to secure their password.

"Strengthen your password. No matter what you think it is right now, make it even stronger. There are tools online to do that," said Knutsson.

Meanwhile, the shadowy mastermind claiming to be behind the hacking is speaking out.

"Guys, just to let you know, I didn't do this myself," the self described hacker says in a message posted online. "There are several other people who were in on it and I needed to count on to make this happen."

"This is the result of several months of long and hard work by all involved," he continued.

Former Nickelodeon star Victoria Justice, one of the 100-plus victims whose iCloud accounts were hacked, says she's taking legal action.

"I am angry at this massive invasion of privacy, and, I am taking legal action to protect my rights," she said.

Eighteen-year-old gymnast McKayla Maroney, famous for her 'I'm not impressed'' face at the Olympics, says a nude image of her posted online was actually taken when she was underage.

The late night comics are fighting the hackers with humor. Jimmy Kimmel joked, "This is why I store all my naked pictures on an Etch-a-Sketch."