Katy Perry opened this year’s Victoria’s Secret fashion show in spectacular style tonight. The singer pulled out all the stops for her performance, which saw her model two eye-popping outfits from designer Todd Thomas.With her killer curves and penchant for wearing provocative costumes, Katy certainly seemed a natural fit for the famous lingerie label. And not to be outdone by the brand’s famous ‘angels’, she took to the catwalk in an incredibly low-cut purple bustier that boasted a big bustle.