Lady GaGa makes catwalk debut in Paris

Lady GaGa has made her catwalk debut at Paris Fashion Week.The 'Born This Way' singer made her appearance on the runway halfway through Mugler's womenswear fashion show, held at a gym on Wednesday.The star, who arrived on the catwalk sporting pigtails, smoking a cigarette and dressed in a black ensemble, was modelling fashion from the autumn/winter 2011 collection, created by her stylist Nicola