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Obsessed: Music Stars' Crazy-Fan Encounters - It's a thin line between love and craze. For a person in the limelight, strange encounters with fans is par for the course. But there have been times when a fan will go from humble follower who may want a picture at an inopportune time to deranged obsessor who will sleep in your house when you aren't there. Yes, that happened. J.Lo, Rihanna and Beyoncé are just a few who've had to deal with such an ordeal. The latest to withstand the odd expereince? Justin Bieber—after a woman was found in his bed earlier this week, even though he wasn't home. Click on for stories of when fans go too far.(Photos: Ethan Miller/Getty Images; S Fernandez/Splash News; Photopress/Splash News)

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Justin Bieber - As if Justin Bieber doesn't have enough on his plate—dealing with recent legal issues and the general chaos of fame—now he's not even safe from screaming fans in his own home. TMZ reported that a woman named Qianying Zhao was found in the singer's bedroom in his Atlanta home. She was arrested for criminal tresspassing. (Photo: Palace Lee/PacificCoastNews.com)

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Jennifer Lopez - J.Lo already had a protective order against John Dubis for contacting her mother when he made an even bolder infringement upon her personal life. Dubis, uninvited, moved into the singer's pool house and updated Facebook with pictures of himself on her property. He managed to stay out of her security's way for several days before police apprehended him.(Photos: Ethan Miller/Getty Images)

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Beyoncé - Beyoncé has no qualms with having an overzealous fan kindly "escorted out" of her presence. At least that's what she told the man who reached out from his spot in the audience and slapped her derriére during a show. Mrs. Carter also had to get an anti-harassment order from the High Court and beefed up her security in response to UK resident Bassey Essien, who was sending the "Crazy in Love" singer threatening letters, including one that claims she is an imposter who killed the real Bey.(Photo: Photopress / Splash News)

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Justin Bieber (Again) - Police had to investigate an inmate who claimed that he hired two hit men to murder Justin Bieber. The inmate, Dana Martin, is already in solitary confinement at a maximum security prison in Santa Fe, but managed to send a letter to a local news station detailing a plot that included blowing up one of Bieber's performances with a bomb. Word from the cell block is that Martin has a tattoo of Bieber's face. (Photo: Bruno Press, PacificCoastNews.com)

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Chris Brown - Chris Brown's lawyer Mark Geragos had to call the LAPD after an obsessor tracked down Brown through Geragos' office, sending multiple death threats via telephone. The case is still being investigated. (Photo: Anthony Dixon/WENN.com)

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Joss Stone - It took a jury all of four hours of deliberation to find Junior Bradshaw and Kevin Liverpool guilty of conspiracy to murder and rob Joss Stone. The two set out for Stone's house with weapons, including a samurai sword. They drove around for hours in her neighborhood trying to find her house and even stopped to ask a postman for directions. Suspicious neighbors called the police. It was later revealed that the two may have been bigger fans of her money and power than her music; notes they wrote indicated they were upset by her connection to the royal family.(Photo: SM/WENN.com)

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Diddy - Diddy has been known to give some ambitious folks their big break, but you've got to do it repsectfully. A Queens, New York man decided to go the break-in route -- location: Diddy's East Hampton home -- and got arrested for it. While there, Quamine T. Taylor ate food, drank soda and liquor, and then went to sleep in Diddy's upstairs bedroom. Eleven years prior, Taylor was arrested for similar charges at another one of Diddy's residences.  (Photo: Chelsea Lauren/WireImage)

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Rihanna - Rihanna won a three-year restraining order against obsessed fan Steveland Barrow. The 31-year-old man was arrested after breaking into a house near Rihanna's Los Angeles mansion, thinking it was hers. During his arrest, Barrow claimed he'd been invited to Rihanna's home and that he only wanted to give her some poetry. (Photo: S Fernandez / Splash News)

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50 Cent - A number of rappers have had their chains snatched in the U.S. 50 Cent had his neck iece ripped off in Angola in southern Africa. Rabid fan Bruno Carvalho went for the take while 50 was performing. The young man was turned in to police by his parents. (Photo: PacificCoastNews.com)

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Jay-Z - A crazed fan of Jay Z got 15 minutes of actual TV fame. Katrina went on the Dr. Phil show to discuss her obsession with the Roc star and, despite it poorly affecting her own relationships, and despite him having a wife, she insisted that they should be together. "I just think he's better off with me, because to me, [Beyoncé] is just fake, and she's not giving her all and all to him." (Photo: Stuart Wilson/Getty Images)

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Janet Jackson - A man named Frank Paul Jones sent Janet Jackson letters threatening to kill every homosexual if he was unable to save her from her "confused" sexuality. Before Janet, Jones also threatened to kill Michael Jackson.  (Photo: Hall/Pena, PacificCoastNews.com)

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Whitney Houston - In 1995, Whitney Houston fan Steve Marriot was arrested when it was discovered that he was living in a movers' truck with an arsenal of weapons — two rifles, a pistol, a shotgun, knives and a crossbow among them. This after he sent flowers to Houston and, in a card, was claiming to be her brother.  (Photo: Frank Micelotta/PictureGroup)

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Keyshia Cole - Keyshia Cole had to file at least two orders of protection against Torey Webster. When she was living in Atlanta, Webster was arrested repeatedly, for various infractions, including his attempts to break into her home and prowl around the outside in search of the "Enough of No Love" singer. He faces up to 13 years behind bars after pleading guilty to aggravated stalking and other charges in 2012.(Photo: Johnny Nunez/WireImage)

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Ashanti - Ashanti's mother, Tina Douglas, had to snatch the "Foolish" singer out of rehearsals for The Wiz when Devar Hurd sent a message that he saw her car outside of the theatre. Hurd had already been sending Douglas a barrage of sexually explicit text messages, including a photo of his genitalia, in attempts to impress Ashanti. He said he was a record label CEO and an aspiring rapper and looked shocked when he was found guilty of stalking and aggravated harassment.(Photo: FameFlynet, Inc)