Monday gossip roundup: Michael Jackson’s secret songs stolen?

There’s at least one person who knows the location of Demi Moore’s secret post-rehab vacation: her estranged husband, Ashton Kutcher. The “Two and a Half Men” star paid a visited to the recovering actress recently, according to People magazine — not that he was exactly enthused about it. “They are not getting back together. He knew it was important to her daughters,” a source says of the visit. As for where it took place, sources tell E! News that they spotted Moore on a private beach near Parrot Cay in Turks and Caicos, at an ultra-exclusive resort only accessible by boat.

Christina Hendricks is the latest star to fall victim to phone-hacking, with a series of sultry photos of the actress leaking online, according to the Daily Mail. But one photo, showing a bare upper torso and purported to be the “Mad Men” star, is a phony, her reps insist. Hendricks claims to not know who hacked her phone, and an investigation is being launched.

Justin Bieber celebrated his 18th birthday with a star-studded surprise bash thrown by his manager and his mom at the Beverly Wilshire hotel in L.A., according to Us Weekly. “Everyone danced all night,” a source says of the soiree. Despite notable guests like Mike Tyson and Kim Kardashian, the birthday boy only had eyes for girlfriend Selena Gomez, who flew in from Florida, where she’s filming a movie. “He was all over Selena the whole time, walking her around by the hand,” a source says. “He kept kissing her.” As for presents, his manager, Scooter Braun, bought Bieber a $102,000 one-of-a-kind Fisker Karma hybrid sports car.

Jennifer Aniston and Justin Theroux enjoyed a weekend of dining, shopping and fun in New York, but it could be the last for a while. The actress says she and her boyfriend — and “Wanderlust” co-star — are abandoning the Big Apple, where she’s lived full time for the past year. “We tried New York,” Aniston said during an Australian radio interview. “It felt like I was [living] in a fishbowl. It didn’t feel like the New York I grew up in and knew.”

Sony has admitted that they suffered a security breach last year that resulted in Michael Jackson’s entire back catalog being stolen, according to Fox News. “Everything Sony purchased from the Michael Jackson estate was compromised,” a source says. The hackers, thought to be U.K.-based, allegedly downloaded more than 50,000 music files worth $253 million, also nabbing music by Jimi Hendrix, Paul Simon, the Foo Fighters and Avril Lavigne. The security breach occurred shortly after Sony’s PlayStation network was hacked in April, compromising user information for 77 million customers.

Cate Blanchett is no fan of plastic surgery, so don’t expect her to go under the knife anytime soon. “I’m not sitting on a soapbox telling women what they should and shouldn’t do,” she tells Fashion ETC. “I just know what works for me. I’d be too frightened about what it means long-term. Looking at women in their 20s doing this stuff, in the end all you see is the work. It doesn’t fill me with admiration; it fills me with pity.”

So that breakup song, “Part of Me,” that Katy Perry debuted at the Grammys? It’s not about soon-to-be ex-husband Russell Brand after all. “I wrote it two years ago, which is funny because everybody is like ‘God, it sounds so current,’” Perry tells MTV News. “Some people that I work with were like, ‘You should just say you wrote it a couple of weeks ago.’ I’m like, ‘I’m not a d—, I’m going to tell the truth.’ I wrote it two years ago when I was writing and recording ‘Teenage Dream,’ [but] it didn’t feel right on the record.”