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?
Honestly, I haven't. But he might have got good £££ to do it.
I think Michelle is actually quite down to earth, there are so many mentions of her being really sweet and friendly when people meet her out and about.