@ the last bit
She doesn't come across as arrogant or a 'chav' at all to me. She seems like a very fragile person to me with low self-esteem. I think the 'confidence' thing is all a mask to hide it all. Her reaction to her appearance in the Bottom Two and then Xtra Factor following her survival spoke wonders for me. She was shaking, crying etc etc. You can tell the whole thing really means a lot to her. I don't think the booing/bad press is helping at all either. I admit the faces she pulls and the things she says in interviews are at times very cringeworthy and awkward, but I genuinely believe it's because she just has very low confidence.
Even if this isn't the case - believing in yourself and being confident is certainly something that shouldn't be condemned.