To put to rest the rumors and allegations once and for all, Justin Bieber will contribute his DNA to prove that he isn't the father of Mariah Yeater's baby. The "Baby" singer took the test in New Jersey Friday, according to TMZ, under "very controlled circumstances." Bieber's peeps are minding their P's and Q's on this one for obvious reasons - they don't want to pay Yeater a single penny. So they made sure there weren't any mistakes made during the test and that a solid chain of custody could be established. It's now Yeater's turn to provide DNA from baby Tristyn. The Bieber lawyers have already said they won't even discuss a settlement at this point, so the obvious golddigger has to clear this hurdle and match up her kid's DNA with that of Bieber's before she gets a check. It's unlikely that'll ever happen, given the texts she sent to friends about another man being her son's father.