Girls Aloud star Kimberley Walsh is speaking to Sarah Harding 'all the time' following her tragic breast cancer diagnosis.38-year-old Celebrity Big Brother winner Sarah revealed last week that she's currently undergoing weekly chemotherapy after the cancer spread to other parts of her body; and with former bandmates Cheryl, Nadine Coyle and Nicola Roberts showing their support Kimberley has reiterated they're with her 'every step of the way.'Speaking to The Sun on the red carpet of the