By Niamh Spence Hollywood actress Alyson Hannigan has shown off a stylish new look as she embraces a ‘midlife crisis’ transformation. The American Pie actress shared a snap of her new hair, which has been dyed to a pink shade, on Instagram as she captioned the snap, “Hello midlife crisis, I think I like you”. In the Instagram post, Alyson showed off her new do as well as adding another clip of her freshly dyed locks whilst wearing the hairdressing gown. Fans were quick to praise the new look for the 50-year-old actress, as one commented: “HELL YEAH! You look so cool!” Another added: “I’ve just…