So, would you hang up your heels for good like Posh?
Yes: 'I'm just plain old me -- and my flats match that!'
Katie Kelly (27) Publicist, Drogheda
'As a commuter, I've always preferred flats to heels -- they come in handy if I have to run for the train.
"Working in PR means I'm often on my feet for hours on end, so I'd never dream of wearing heels to work in the first place. Aside from the practicality, flat shoes have always been fashionable.
"Diane Keaton's androgynous Annie Hall look is as fresh today as it was back in the 70s. And celebrities such as Alexa Chung and Kate Bosworth often wear flats on the red carpet.
"Personally, I like to juxtapose a girly dress with mannish brogues or a boyfriend shirt and skinny jeans with ladylike loafers. And when I do venture out in heels, I'm never without a pair of flats stashed in my bag as back-up.
"So okay, flats definitely don't give you the same va-va-voom that heels do, but I still think they can be quite sexy. For one thing, you'll never see a girl in flats with a pained expression on her face on a night out.
"There's also something sexy about a girl who has the confidence to wear boyish shoes -- and let her other assets do the talking.
"Unlike a lot of high- street heels, flat shoes are usually really well-made and last ages. I buy a lot of handmade leather flats from London designer Kate Kanzier. But even if I blow the budget on a new pair, I never suffer from 'buyer's remorse' like I would with new heels because I know I'll get a lot of wear out of them.
"I've had a couple of pitying comments from other girls about the fact that I always wear flats, but it doesn't bother me.
"For me, fashion is an expression of who you are. And while I'll rock heels when I'm feeling bold and brave, most days I'm just plain old me -- and my flats match that."
No: 'It's nice to walk tall and strut in the office'
Nikki Sheridan (23) Singer and dancer, Marino
'To me, wearing heels is as necessary as wearing a bra. Rain, hail or shine, I never leave the house without an extra couple of inches strapped on to my feet.
"As I'm not that tall, I'll never stop wearing heels like Posh. But heels don't just add to my height, they boost my confidence too.
"There's something very empowered about a woman who can strut around the office in stilettos and still get the job done.
"On girls' night out, I break out the skyscrapers -- which don't come off until I'm tucked up safely in bed.
"Once you're confident in your heels, I don't think it matters how high they are -- it's all about holding your head high, your shoulders back and simply placing one foot in front of the other.
"That said, I've taken a couple of tumbles -- and my friends get a great kick out of watching me shuffle down the street to catch a bus in my heels.
"But when I do wind up horizontal in my heels, I just get back up again and laugh it off.
"I aspire to be like Beyoncé -- who can not only walk in heels, but dance in them as well.
"What we wear defines who we are -- and sometimes, it's nice to walk tall."