Mariah Yeater had convinced the baby's father is Robbie Powell

 Former Mariah Yeater says Justin Bieber is not the father of her child.

Justin Bieber was the target of much speculation since Mariah Yeater claimed he was the father of her four months son.

However, the ex-boyfriend of Mariah Yeater was convinced to be the baby's father, and is even willing to do a DNA test to prove it, reports TMZ .

Some time ago, we had discovered text messages exchanged between Yeater and a friend in which she spoke of her ex-boyfriend, Robbie Powell, as the father of the child.

Sources close to Powell explained that he decided to make this admission now because he has had enough as Yeater used to attract baby's attention from the media.

A source says Powell told his friends that Yeater had confessed that the story of Justin Bieber was false. Powell believes that the sole purpose of Yeater was to make money. Powell was approached by several media to tell his story, and he thought now to accept. Yeater Mariah's lawyer offered no comment about confessions of Robbie Powell.

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