After her appearance at the i-D party last night, Agyness Deyn has got us divided over whether the trusty denim jacket is still in vogue. She fronted up to Bistrotheque in east London in a cropped denim jacket, flicked hair and Betsey Johnson prom dress. Earlier, she was spotted in the same jacket worn over a white tiered dress and bright red tights. While some seem to think that it only reinforces her Tatler title as Britain's best dressed, others believe that Agy is suffering from a touch of the Billy Idols. What do you think? Has the denim jacket had its day? Cast your vote in our reader poll after the jump.