Justin Bieber Ingnoring Paternity Lawsuit : Singer Wants To 'Focus On The Positives'

                                    Justin Bieber has baby issues .
Despite the pop star denying claims that he fathered a child with a female fan , the great-grandfather of the alleged love child is speaking out . Eddie Markhouse tells Inside Edition that his granddaughter ,Mariah Yeater , doesn't lie .

"I don't know the whole story . But from what I understood , she met him at a concert and he sent the two security guards down off the stage to bring her backstage to meet him." Markhouse said , "She said they partied , had some drinks and they indulged in sex ... she's bacially an honest good person . She's got a big heart . She's a good kid and loves this baby."

Yeater , 20 , filed a lawsuit claiming she had sex with the 17-year-old singer backstage at one of his L.A. concerts and gave birth to his alleged son three months ago.
The woman wants Bieber to take a paternity test to  "scientifically confirm " he's the dad , according to paperwork obtained by the Star.

A spokeman for Bieber , Matthew Hilzik , denied the allegation .

"While we haven't yet seen the lawsuit , it's sad that  someone would would fabricate malicious , defamatory and demonstrably false claims ," he said , "We will pursue all available legal remedies to defend and protect Justin against these allegations ."

Following the shocking claim , Bieber took to Twitter to say he's going to 'focus on the positives.' I'm going to ignore the rumers ... and focus on what is real ," he  wrote Wednesday , "an opportunity to help by doing what I love  . Judge me on the music  ! Love yall !"

Another paternity rumor Bieber wants nothing to do with that he's the adoptive parent of a recently-rescued dog .

During an interview on Ryan Seacrest 's KIS-FM radio show Wednesday , The "Baby" singer  denied reports that he and girlfriend   Selena Gomez  adopted a puppy together during a visit in Canada.

"It's so funny because people keep talking about this dog and I don't even have a dog  !  I never got a new dog  ! I didn't adopt a dog," he said . Though the teen senation has a familt dog that resides at his grandparents house in Canada , he says he's nowhere close to owning a pooch of his own .

So who ended up taking home the adorable husky mix the Biebs was photographed carrying last month ?

"A friend of mine did," the 17-year-old said . "I don't have anything to do with the dog . I think he'she's a cute dog . I love dogs and I condone people adopting from shelters."

The only baby in Bieber's life , however , appears to be his newly released Christmas album, "Under the Mistetoe," in which a portion of his profits will go to charity . "I'm trying to help give back ," he tweeted . "Nothing will stop me from that focus ."