Justin Bieber to Take DNA Test Over Fan's Paternity Claim

Justin Bieber is set to take the next step – a DNA test – to prove he isn’t the father of Mariah Yeater’s baby.

Bieber, 17, has already vigorously denied the 20-year-old fan’s claim that he got her pregnant, saying he never even met her. He will take the test once he returns to the U.S. from Europe next week, a source tells PEOPLE.

Cindy Crawford Thanks FBI for Nabbing Blackmailer

A would-be blackmailer accused of targeting Cindy Crawford and husband Rande Gerber in an unsuccessful extortion plot has been sentenced by a German court to two years behind bars.

Edis Kayalar, 26, was convicted of threatening to sell what he called a “sexy” photo of the couple’s then-7-year-old daughter tied to a chair with a gag in her mouth. The child apparently was playing when the photo was taken, according to authorities.

David Letterman Thanks Authorities in Blackmail Case

David Letterman spoke briefly on his CBS Late Show Tuesday to thank authorities who handled the $2 million extortion attempt against him, which earlier in the day had resulted in Robert “Joe” Halderman’s guilty plea and sentence to six months behind bars.

Accused Blackmailer Pleads Guilty in David Letterman Case

David Letterman avoided a potentially messy trial that would have shed light on his relationship with employees of his CBS Late Show as a former CBS News producer, Robert “Joe” Halderman, pleaded guilty Tuesday to attempted grand larceny in a Manhattan courtroom.

He was sentenced to six months in prison for attempting to extort $2 million from the late-night host in exchange for keeping quiet about Letterman’s affair with a staffer.

INSIDE STORY: How Celebs Thwart Their Blackmailers

In an industry where privacy is hard to come by, celebrities prefer to keep their dirty laundry behind closed doors. But a recent string of extortion plots against Hollywood players has them coming out swinging – no matter the risks of humiliation or hardship.

Larry Stein, an attorney who represented actor Rob Lowe and his wife in an alleged extortion plot by their former nannies, says, in fact, more celebrities are willing to face down their blackmailers.

Mistrial Declared in John Travolta Extortion Case

After nearly four weeks in a courtroom, a Bahamian judge declared a surprise mistrial late Wednesday in the John Travolta extortion trial, leaving the actor and his attorneys mystified and upset.

Senior Supreme Court Judge Anita Allen declared a mistrial because of juror misconduct following an announcement from a local politician that one of the defendants had been acquitted – before the jurors came back with their verdict. Allen ordered a retrial, but did it remains unclear when, if ever, the case will be retried.