11/04/2011 04:33 pm ET Updated Jan 04, 2012

Justin Bieber's Paternity Lawsuit; Mariah Yeater Accused Ex-Boyfriend Of Being The Father First

The woman who claims Justin Bieber fathered her child -- originally accused her ex-boyfriend of being the daddy to the very same baby last year ... this according to her ex-BF's grandmother.

Read more on www.tmz.com