What's Hot, What's Not - Your Weekly Guide to Cool

1 - Entrepreneurs

Budding businesswoman? Take inspiration from Lauren Pope, founder and face of Hair Rehab extensions and a finalist in ITV's recent Tycoon - a Dragon's Den style show. The 23-year old model-turned-entrepreneur's clip-in natural hair extensions come in 4 different lengths and colours, and are a more hair-friendly alternative to their glue-in counterparts. Now that's the business.

2 - The Simpsons

There's no avoiding it - The Simpsons Movie is going to be the biggest cinematic event of the year, and with Madge and Co starring in their very own Harper's Bazaar spread, big blue hair and donuts have never been so cool. Well, maybe not the blue hair. But definitely the donuts...

3 - Mahiki

It's gained a bit of a reputation over the recent months as a bit of a royal playground, with Kate 'n' Wills and Harry 'n' Chelsey all crossing it's threshold, but it's not just the toffs that come out to play at Mahiki - with celebs including Girls Aloud, Mischa Barton and Paris Hilton partying there, Mahiki is still very much an A-List haunt. We're particularly partial to one of their Ultimate Mai Tais (or 4).

1 -  Knickers (worn as outerwear)

A note to all Big Brother contestants - only Superman can get away with wearing his underwear as overwear. Whatever happened to cool and classy?

2 - Dirty Dancing

No, not the film. Instead we refer to the cringy snaps of TomKat dancing at Posh and Becks' Welcome To America party captured by US Weekly. We turned the same colour as Katie's beautiful dress just looking at the pictures - the words "embarrassing" and "dad" spring to mind...

3 - Bag Envy

Just how did Nicole Richie manage to get her hands on the new and strictly limited edition Chloé Heloise bag for her recent court date? We've been good little girls all year - not fair!