PVC leggings appear to be among the latest must-have fashion accessories, with plenty of celebrities adding plastic to their wardrobe.X Factor winner Alexandra Burke, her mentor Cheryl Cole, style icon Victoria Beckham and pop star Rhianna have all stepped out in the skin-tight item.Perhaps the stars are thinking economically in the credit crunch, as PVC leggings are a useful little number for dressing up or down, with a long t-shirt for the day or a glitzy dress for the night.Alexandra Burke's star is rising in the fashion and political stakes, with prime minister Gordon Brown saying he will be buying her single as a Christmas present.The London songstress, who wowed audiences in the X Factor after a show-stopping duet with pop diva Beyonce, going on to beat boyband JLS for the reality TV show title, has already broken the record for the fastest-selling download ever.(c) 2007 Adfero Ltd.