Rita was talking specifically about the Eurovision selection show on the BBC in 2009, which both she and Jade auditioned for. Rita walked away from the auditions and refused to take any further part. She basically inferred that she's glad she didn't go down that route because she's had more success by going her own way. Fair enough, but then she mentioned Splash! and said that she'd never lower herself to do a show like that. As the only person who has appeared in both shows is Jade, it's blindingly obvious who Rita was referring to.
Rita seems to be a) assuming that she'd have won the Eurovision selection show if she hadn't walked away after her audition and b) assuming that now she's successful, she will always enjoy the same level of success. Silly girl.
Not very humble is she. I don't think this is going to end well for her because the public (in the UK anyway) don't seem to like her. I hope she likes Butlins because she could be spending a lot of time singing there in a couple of years.