The stepdaughter of former England footballer Paul Gascoigne has previously modelled for magazines including FHM and Maxim, appeared on Celebrity Coach Trip in 2010, and won the second series of ITV's Love Island alongside Calum Best in 2006.
"Since I was young I've grown up in the public eye because of my dad, Paul Gascoigne, who's like a legend at football," Bianca explains to the judges.
Talking about her early experiences of fame, she says: "I do look back and just wish I was a bit more sensible. I hate the fact that people see me as this party girl because I have got so much more to me than that."
"I've always been a singer," she adds. "This is something that I've wanted to do and it's been years and years I've thought this through to do it and now I'm here I'm just like, 'Oh my god!'
"I just hope they don't think I'm just doing this as another show - this is really what I want. I love singing and hopefully they can see that when I walk on stage; you know that I really do care and that I'm going to be nervous because it means so much to me."
Photo gallery - The X Factor episode 6:
Copyright: ITV THAMES TV/SYCOAfter singing Mary J Blige's 'I'm Going Down', the judges are lukewarm in their assessments.
"If I could compare you with the other 25-year-olds we've had, it's really not good enough," says Gary Barlow.
"What the other 25-year-olds have is that they've been singing all their lives, seriously singing. At 25 you should be a lot better than that. In general it was a bit of a mediocre audition."
Louis Walsh adds: "Bianca, you haven't got a bad voice - you've got a great image, you know. But it's tough because we've got some amazing singers in this category already."
Tulisa Contostavlos tells her: "I appreciate and admire the fact that you've come up and basically wanted to try something different and change the public's perception of you and I think you're a cool girl - I've met you out a couple of times - but I've got to be honest, I don't think the vocals were strong enough for this competition."
Bianca Gascoigne's audition airs on The X Factor tonight (September 15) at 8.10pm.
Watch Bianca's stepfather Paul Gascoigne perform his hit 'Fog on the Tyne' below: