An unidentified woman claimed to have fallen pregnant by the 'Boyfriend' star following a frolick in Miami Beach on February 4, 2010.
Biebs was thanking Tyler, The Creator for taking the heat for him over some car drama when he shot down these latest claims.
Tyler had said: "That Was Me Behind The Wheel Of Justins Vehicle. Don't Blame Him. People Are Actually Evil Swearing Up And Down That It Was Who It Wasnt."
Justin responded: "all good buddy. i deal with this everyday. thanks though. the baby aint mine either."
In 2011 Mariah Yeater made a similar high-profile claim that Bieber had fathered a child by her; claims he firmly denied. He then wrote a song about her for the deluxe edition of his Believe album, which was released last June.
Yesterday he also put out another shout for buddy Jaden Smith's new film After Earth, giving it a much needed boost after a terrible critical reaction and poor box office returns. He wrote: "did everyone support @officialjaden and see #AfterEarth - if not see it!!"
Well, did you?