Nadine has the voice that's why she was tipped to be a solo artist when Girls Aloud first started their break. Nadine's singing has never been the problem. It's always been her work colleagues that haven't been good enough.
Of course the failure to launch her successful solo career is everyone elses problem but hers.
Tweets like this are really unprofessional, especially if you fail to promote the tour/re-union like the rest of the group, as it has been mentioned in this thread.
I'm still wondering from where people got the idea, that GA would not split up after this tour? Didn't Cheryl say it in her book, and many interviews even before they started?