I've just read the interview. And it's soooo just a lads mag, if she was interviewed in Heat magazine it would be totally different.
Everything she's saying is designed to sound 'sexy', like
"I’d like to have cute, friendly animals around. An underwear shop on the corner."

I doubt most people would say stuff like that really, and she does come across as a bit ditzy but i don't think anyone should regard that lads mag interview as a true representation of the way she is.
Thing is with the media, they portray people by anything that they can make fit, whether it be tart, bad boy, chav etc... In Imogen's case it's gonna be tart after the video stuff.
She wants to be famous, and if a popular magazine pays her a lot of money to do that then i'd go along with it too, why not
I just don't think that interview is totally accurate, maybe the 'msn'

who interviewed her was putting words in her mouth and she was just agreeing lol.