Justin Bieber: A young father?

Justin Bieber has been asked to undergo a DNA test to determine if he is the father of a fan's baby.

Mariah Yeater claims her son Tristyn Anthony Markhouse Yeater, who was born on July 6, was conceived when she has "unprotected sex" with the pop megastar on October 25, 2010, following up performance at Los Angeles Staples Center.

Lawyers Lance Rogers and Matthew Pare, who are representing the 20 year old California woman, insist she is following the correct legal protocol and just wants the baby singer to take parental responsibility.

They told America's star magazine: "Mariah Yeater is pursuing a modest and rightful claim. There is credible evidence that Justin Bieber is in fact the father of his baby. The evidenc will be revealed on court.. She is not seeking exorbitant compensation. She merely requests that Justin Bieber provide a DNA sample to verify that he is father of mariah yeater baby and if so help to provide child support as required by California law.