Justin Bieber: 'credible evidence' pop star fathered older fan's child

Mariah Yeater, 20, is "pursuing a modest and rightful claim" from the 17-year-old Canadian pop star, who is battling to save his clean-skin image amid a growing scandal.

The Californian woman claims she had sex with the devout Christian, who has criticised casual intercourse in the past, at one of his concerts.

She further claimed that he is the father of her newborn baby, Tristyn Anthony Markhouse Yeates.

Bieber, who was 16 at the time of the incident, vehemently denies the allegations that have rocked the music world and left millions of his mainly teenage female fans stunned.

Miss Yeater is said to have filed a lawsuit earlier this month claiming that Bieber's bodyguards invited her backstage after a performance at the Staples Centre, in Los Angeles, in October of last year.