I know exactly what you mean.
I was expecting her image to be very much similar to what we saw at Supernova, and if she was going for a dress, it would be simple like the one she wore for the Supernova final. I also prefer her hair up in that high ponytail. I'm not sure the "glamour diva" look fits this song.
To be honest, the staging and her look is completely different to what I was expecting so I have to reserve full judgement for now until I see another rehearsal.
However, those backing singers need to be put out of their misery. They are far too loud and making the chorus sound messy and screechy, and this is a real cause for concern. I really wish she could use playback vocals for the backing singers.