I don't know FACT but maybe just a hunch? I am guessing someone who models for FHM/calendars, has perma-tans, hair extensions, teeth bleaching etc etc I would think they're pretty vain? There's people that like to better themselves but then you get people who are in love with themselves.
So you think Mark Wright isn't vain? Have you seen his calendar?
I think Mark Wright is vain, without a doubt. I don't think Michelle is though, she's beautiful but it doesn't seem to have gone to her head imo. She seems like a nice down to earth girl to me.