After vehemently denying Mariah's allegations, JB agreed to take a paternity test in a bid to rubbish her claims, with Yeater's ex-boyfriend Robert Powell later telling the press that he was in fact Tristyn's father.
Months after the whole Bieber baby fiasco, Justin has reignited interest in the story by posting a tweet directed at Yeater on the social-networking site.
On Saturday (21st April), Justin tweeted: "Dear mariah yeeter (sic)...we have never met...so from the heart i just wanted to say...," - he then added a video of Sacha Baron Cohen's character Borat saying: "You will never get this", over and over again.
Bieber previously slammed Yeater's accusations, telling NBC's Today Show in November last year: "None of it is true. Never met the woman."
"I'd just like to say, basically, that none of those allegations are true. I know that I'm going to be a target, but I'm never going to be a victim."
In other Justin Bieber news, the teen heartthrob was spotted shooting the promo for his new single Boyfriend over the weekend, which saw him kissing and cuddling up to a brunette - who was a dead ringer for current girlfriend, Selena Gomez.