Embattled comedian Bill Cosby has defended his decision not to respond to the growing number of sexual assault accusations levelled against him, insisting "people should fact-check".

The veteran star's attorney Martin Singer has repeatedly slammed the historic allegations of inappropriate behaviour from women including model-turned-Tv personality Janice DICkinson and actresses Barbara Bowman and Louisa Moritz, most recently dismissing them as "unsubstantiated, fantastical stories", which he claims are "becoming increasingly ridiculous".

Cosby's stand-up tour of the U.S. has been dealt a major blow by the reports, with five of his upcoming gigs being cancelled by organisers amid boycott fears, but now the actor has addressed the growing controversy himself, suggesting he has nothing to answer to.

Speaking to the Florida Today newspaper before his gig in Melbourne, Florida on Friday (21Nov14), he said, "I know people are tired of me not saying anything, but a guy doesn't have to answer to innuendos. People should fact-check. People shouldn't have to go through that and they shouldn't answer to innuendos."

The 77 year old received a show of support from fans attending Friday's gig, where he was given a standing ovation, a day before former Playboy Playmate Victoria Valentino added her name to the list of alleged victims.

In an interview with the Washington Post, published on Saturday (22Nov14), Valentino revealed she met Cosby in Hollywood as she struggled to come to terms with the tragic death of her six-year-old son, who had drowned in a swimming pool in 1969.

They went out for dinner with her friend, Meg Foster, and were invited back to an apartment, where she claims, "He was trying to cheer me up, and he stuck a pill in my mouth. He said, 'This will make us all feel better.'"

Valentino claims Foster passed out after ingesting a similar pill and adds, "It was very clear to me that he was going to assault her while she was asleep or unconscious. I reached out, grabbing him, trying to get his attention, trying to distract him. He came over to me and sat down on the love seat and opened his fly and grabbed my head and pushed my head down. And then he turned me over. It was like a waking nightmare."

Cosby has never faced criminal charges, but reached an out-of-court settlement with a woman in 2006 after she accused him of drugging and groping her.