It was rock week on the X Factor this week(not that anyone told Tulisa..I mean Kesha???), and that meant Saturday was the night for leather, studs and a whole lot of black outfits. Kelly won the saturday night war in a sexy little black leather dress from…Topshop. This dress seemed made for her new curves and suited the rock night theme without going overboard. I liked so many details of this dress.The fact that the skirt was short, but not too short, and with the skater effect it avoided looking tarty like a straighter skirt would have done. Although I like Kelly’s hair when it is sleek and straight,  a…