"I have multipersonality disorder - in a very good way, of course - when it comes to my fashion choices. When I first started playing around with my look, it was more of a Dita Von Teese pinup thing. Dita's really dedicated"

Katy Perry is describing her style choices and how she has multiple personalities when it pertains to her style. She points out Dita Von Teese, a popular pinup model, as an impact on her look. This suggests that she has a penchant for vintage and retro designs. She also suggests that she has actually been committed to her style options, which could mean that she has actually put a lot of effort into creating her own special design. This quote reveals that Katy Perry is confident in her style choices and takes pride in the effort she has put into producing her own look. It also shows that she is influenced by Dita Von Teese and has taken impact from her style.