Of course, Justin Bieber’s alleged baby mama has a mug shot! Mariah Yeater was arrested for battery after she allegedly slapped her ex-boyfriend, a guy named John Terranova who she originally accused of being her baby’s daddy, last year (December 2010).

Mariah Yeater Baby Daddy Scam: John Terranova Calls Her a Liar

The 20 year-old woman apparently lost her cool after John said her unborn child could not be his, and she slapped him. Well, Mariah is desperately seeking a daddy to support her 3 month-old baby Tristyn.

Justin Bieber’s Alleged Son: Baby Tristyn FIRST PHOTOS

If John isn’t the baby’s father, then it must be Justin Bieber of course. Who else? Mariah is clearly delusional. And the truth is she probably had sex with the Biebs… IN HER DREAMS!

Mariah Yeater PHOTOS: Justin Bieber’s Alleged Baby Mama