Justin Bieber, the teen idol has spoken out for the first time since allegations emerged that he has fathered an illegitimate love child with Mariah Yeater, a 20-year-old fan.

Justin Bieber, 17, tweeted today that he was choosing to ignore the rumours and rather concentrate on his music.

The singer statement comes on the day that Mariah Yeater is pictured on the cover of U.S. magazine Star with his alleged son, Tristyn Anthony Markhouse Yeater, who was born on July 6.

“So Im going to ignore the rumours…and focus on what is real an opportunity to help by doing what i love. Judge me on the music! Love yall!” Justin Bieber tweeted to his fans this morning.

Justin Bieber tweeted today that he was choosing to ignore the rumours and rather concentrate on his music

In news which has stunned the world, Justin Bieber is now at the centre of a paternity lawsuit which Mariah Yeater filed on October 31.

Mariah Yeater has asked Justin Bieber to submit to a paternity test, and a claim “to provide adequate support for my baby”, for the tryst which she allegedly lasted no longer than 30 seconds.

In a legal statement, sworn under penalty of perjury, Mariah Yeater told a California court that Justin Bieber propositioned her on October 25 of last year, when she was 19 and he was 17, after his concert at L.A.’s Staples Center.

According RadarOnline.com, Mariah Yeater told a judge: “When I later realized I was pregnant with Justin Bieber’s baby, I tried to contact him through his representatives but no one ever called me back.”

Mariah Yeater is pictured on the cover of U.S. magazine Star with his alleged son, Tristyn Anthony Markhouse Yeater, who was born on July 6

Mariah Yeater said: “On July 6, 2011, I gave birth to a baby boy. That was exactly 36 weeks and two days after the sexual encounter with Justin Bieber.

“Based upon the timing as well as the fact there were no other possible men that I had sex with that could be the father of this baby, I believe that Justin Bieber is in fact the father of my baby.”

Justin Bieber’s spokesperson has vehemently denied the allegations, and told RadarOnline.com:

“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.”

Mariah Yeater wrote a detailed statement about meeting her idol Justin Bieber in papers submitted to a Los Angeles court.