Justin Bieber fan Mariah Yeater, who claims to be mother of star's baby

The allegations cast ­serious doubts over her legal claim against the 17-year-old singer - who she is demanding takes a DNA test.
Miss Yeater first said ­her ex John Terranova was the biological dad, then said it was a secret lover named "Steve". It was only after her son Tristyn Anthony Markhouse Yeater was born in July that she claimed Bieber was the real dad in court papers seeking £170,000 a month from him in child support.
But the Sunday Mirror has tracked down Miss Yeater's friends in Las Vegas, who say the 20-year-old mum has a "troubled relationship with the truth",­ and that they don't know what to ­believe.
One said: "I saw Mariah four months ago - just before she gave birth - and she said she thought her boyfriend John was the baby's father. But she also said Steve might be the real dad."
Miss Yeater claims her baby was conceived after a 30-second romp with Bieber backstage after his show at the Staples Centre, LA, on October 25 last year.
But soon after falling pregnant, Mariah turned up at ex-boyfriend John's house in Las Vegas and said HE was going to be a dad. The 19-year-old said he ­initially believed her claims, as he had been dating her for four years before she moved to California.
But when he checked the dates he realised it was impossible for him to be the child's ­father.
Last night John said he was convinced his ex was also lying about Bieber being the father.
"I know it's not Justin Bieber. She just wants money," he said.
"She came back here from California telling me she was pregnant with my child. I said, 'This is impossible, you've been in California two months and back here for only a week.' She told me, 'No, I got pregnant before I left'. But it didn't make sense because she had a doctor's note saying she wasn't pregnant enough for that to be possible."
Then she blamed ­"Steve". A friend said: "Steve was her secret boyfriend for a long time. She said they made love twice. One of the times the condom broke, so she thought that might be when she got pregnant."
The female pal added: "Mariah also mentioned she had hooked up with Justin Bieber and he might be the father of her baby. But as soon as she said this, she added, 'Just kidding'.
Mariah's friend said ­jobless Miss Yeater has a history of claiming to be pregnant and telling "stupid little lies".
Bieber mocked her claims, saying: "She's a ­ridiculous liar. She's not worth talking about."