This is from interview with Sarah:
Lets talk about your ITV2 show, The passions of....Girls Aloud. Nadine pulled out of the programme after filming started. Did that piss you off?
No, she did take part in it briefly, but her challenge wasn't doable. She was going to conduct an orchestra. It wasn't exactly what she expected and, by that point, it was too late to change. We had to make a decision and we just went ahead with the four of us.