The 28-year-old beauty admits the band - comprising herself, Cheryl Cole, Nicola Roberts, Sarah Harding and Nadine Coyle – thinks working as a solo artist is tougher than being in a group as there is not as much support.
may have had trouble in the fame game if they had gone into the music business solo.
She said: "We've still got that support network now, you know.
"I think that's why we've all stayed pretty balanced – because we've got each other. It must be hard doing it on your own."
Kimberley also admits she feels sorry for George Michael – who was recently found guilty of driving under the influence of drugs after driving his car into a photography shop – and hopes he sorts out his personal problems.
She said: "George Michael is a national treasure so to see him in court for crashing his car into a Snappy Snaps while he was affected by drugs was upsetting. Everybody loves him and wants him to do well so let's hope he sorts things out."