Nadine says Girls Aloud could be back as a four-piece for their 20th anniversary next year.
The singer topped the charts with 'Wear It Like A Crown' and funds will go to The Christie Foundation NHS hospital in Manchester.
The 39-year-old revealed last year that she had been diagnosed with breast cancer.
The Girls Aloud star has died aged 39 following a year-long battle with breast cancer.
The Girls Aloud star said the book she's been writing in treatment was set for release next month.