Diana Vickers has been photographed bearing an uncanny resemblance to Coronation Street's iconic character Deirdre Barlow as she rocked a pair of huge glasses.The 29 year old, who looks completely unrecognisable to her days on TV, was seen walking down the street to a recording studio in London on Wednesday.The X Factor star, who was a semi-finalist on the show in 2008, donned some yellow-tinted oversized sunglasses, which she paired with a bright red lipstick, making her look the spitting image