What men should wear to weddings: lessons from six celebrities in pictures

Morning suits? Please. Whether guest or groom, what men wear to weddings has evolved. Just look at One Direction's Harry Styles, who decided a black shirt unbuttoned to his naval was the correct attire for his friend's mum's wedding last weekend. All of which raises the question: sunglasses aside, what is appropriate? Here's what we've learned from six celebrities Some of us are born with style. Others, like Harry Styles, look to Pete Doherty for guidance, which probably explains his adventurous...