Formerly the bass player in Spandau Ballet, Martin Kemp is best known by the UK public for his role in the soap opera EastEnders, where he played Steve Owen. Kemp made the transition into acting with a lead role in the movie The Krays, playing opposite his real-life brother Gary. In 1995, Kemp discovered that he had a brain tumour (which at its peak weighed more than two kilos). After three years of operations and therapy, he made a full recovery. Martin Kemp also, bizarrely, was born with three kidneys, while his brother only has one- but they're not twins!

Sources: bbc.co.uk/eastenders, Johnny Vaughan Tonight