Girls Aloud's Sarah Harding had tough time, says Walsh

Girls Aloud star Sarah Harding "has had a tough time" but is "back on track", according to her band mate Kimberley Walsh.

Harding went into rehab in October 2011 to be treated for depression and alcohol problems.

She said the group reuniting to mark their 10th anniversary was "obviously going to help".

Kimberley Walsh was speaking to Newsbeat's music reporter Greg Cochrane.