By Adam B. Vary
November 01, 2011 at 12:00 PM EDT

In response to reports that a 20-year-old California woman has filed a paternity suit against 17-year-old Justin Bieber — reportedly alleging the two had sex backstage at one of his Los Angeles concerts when she was 19 — the music star’s rep has sent the following statement to EW (emphasis hers):

While we haven’t yet seen THE LAWSUIT, it’s sad that someone would fabricate malicious, defamatory, AND demonstrably false claims. We WILL VIGOROUSLY PURSUE all available legal remedies to DEFEND AND protect Justin against THESE ALLEGATIONS.

EW could not independently confirm the lawsuit, as paternity actions are sealed in the interest of the child.