Gentlemen might prefer blondes, whilst brunettes are traditionally more sensuous and mysteries, but it is redheads who are having a moment. From Karen Gillan as Dr Who‘s sexiest and most stylish assistant ever, to Nicola Roberts rise to fashionista fame, redheads have been at the forefront of fashion in 2010. Redheads of all colours and tones have been everywhere in 2010. They are on your tv screen, in your iPod and in the pages of your fashion mags.  Some are naturally auburn, others are proudly coiffed out of a bottle, but all have exuded such style and panache that the likes of Rihanna and Cheryl Cole have recently hitched a…