The woman in question reportedly filed a paternity suit against Justin, claiming she and JB had a special hug backstage at a recent concert at the Staples Center in L.A. ... and nine months later, she popped out a baby, baby, baby, oh.
But we're told Justin believes the story was "completely created up."
Bieber simply tweeted concerning the case -- saying, "Im about to ignore the rumors...and specialise in what's real. a chance to assist by doing what i like. decide me on the music! Love yall!"
