Kelly split from her fiance Luke Worrall in July last year after it was alleged he had cheated on her.
She has since moved to Los Angeles with her best friend Nate and she hopes people realise that she is doing OK after the break-up.
The 26-year-old said: 'I have one thing to say to people publishing stories saying I'm sad and that I'm pining for my ex - you're full of s***! My friend Nate didn't move in because I'm lonely or to 'look after' me but because he's my best friend and we've been talking about it for ten years.
'I'm too busy with work and friends to be lonely. People should stop making out I'm some sad arse sitting around feeling sorry for myself - I've moved on.'
Osbourne also hit out at Courtney Love for choosing to make a statement about how she had supposedly called her a 'crackhead' and responded by saying she had saved Kelly's life.
She added: 'I'm tired of people starting these stupid one-sided arguments just to get press for themselves. I didn't want to fight back because that's what she wants, but I didn't even say she was a crackhead in the first place. The whole thing is ridiculous.'