Ex-boyfriend of Justin Bieber's alleged Baby-Mama claims he's the Baby-Daddy

The ex-boyfriend of Justin Bieber's alleged baby mama has no doubt he's the daddy of the baby she claims Justin fathered and he wants to take a DNA test to prove it. 

Mariah Yeater allegedly sent text messages to a friend, fingering her ex, Robbie Powell, as the baby daddy. And sources close to Powell says he's making his move because he's tired of Yeater using the kid for media attention.
Robbie has been telling friends that Mariah told him the whole Bieber story was BS. And Robbie believes she did it for the money because she's desperate for cash.

Powell has been approached by several media outlets to tell his story and he's reviewing his options.