Davina McCall has said the "hardest thing" about Sarah Harding's death is that she was "hard on herself" for not being diagnosed with breast cancer sooner.The Girls Aloud singer sadly passed away after a battle with the disease last month at the tender age of just 39. Davina, 53, had a connection with the superstar, hosting both Popstars: The Rivals – the show which former Girls Aloud in 2002 – and The Jump, which Sarah competed in in 2016.