Style de la Semaine

This week's gong for best dressed has me divided. There are two looks which I just love.

Leighton Meester has upped her game this week. At the launch for Vera Wang's new perfume Miss Meester opted for a refreshingly new take on launch party glamour.

A pale pink pleated top and slim black leather look trousers were the perfect combination of feminine and edgy. The nude platform sandals by Brian Atwood are worth extra style points.

The Duchess of Cambridge continues to pleasantly surprise me with her choices. She is without doubt a new muse for the fashion world. For the ARK 10th Anniversary Gala Dinner in London, Kate wore a shimmering pale pink gown by Jenny Packman. The dress was floor length and beautifully embellished.

Kate continued her love affair with the high street by pairing the dress with LK Bennett's Agata shoe and pink satin box clutch. The shoes alone were stunning - a pale pink peep toe, with stiletto heel and a side bow on the ankle strap.

Return of the Vamp

Leighton Meester wows in this black number by American designer Michael Kors.

Stepping away from the prim and proper look of her Gossip Girl character Blair Waldorf, Leighton looks every inch the vamp in this cut-away maxi. The long chiffon skirt balances the toughness of the leather bodice; and the flashes of flesh send the temperature of this outfit soaring high.

Taking the look to the max, Leighton teamed the dress with dark red nails, smoky eyes and poker straight hair.

Fashion forward and flattering, Leighton is one to watch in the fashion stakes this year.

Everybody's wearing... White Shirts

If someone told me at the start of this season that the one item I'd need was a white shirt, I would have hibernated in my polar bear PJ's with the new box set of Gossip Girl, and no-one would have heard from me till there was blossom on the trees.

In case you hadn't already guessed, I find a white shirt somewhat unremarkable. Yet, styled right, this item will be the most coveted item in this Winter's wardrobe.

Celebs are lining up left, right and centre for a piece of the shirt action. Gwyneth Paltrow tucked her silk shirt into black tailored shorts and teamed it with a metallic clutch, understated black courts and a long pendent necklace. This outfit is effortless sophistication at its best.

Leighton Meester gets double fashion points - pairing her shirt with the season's cargo trousers. Like Leighton, leave a few buttons undone and go for short or rolled up sleeves for day time wear. Add a big bag and statement heels in a muted tone to sex up the look.

A new trend doesn't really exist until Sienna's worn it. Miss Miller modernises the classic shirt and trouser office ensemble, with a military shirt. Gold buttons galore and sharp shoulders glam up the dark trousers. Not one to shy away from attention, Sienna spices things up with a 60s inspired, stack heeled platform. What a beaut!

Topshop have some gorgeous takes and cater for all price bands. Follow in Sienna's footsteps with the Gold Button Military Shirt, £38 or try the Side Tuck Short Sleeve Blouse, £38 to re-create casual chic a la Leighton.

If, like me, you're not quite sure about the white shirt, opt for a patterned or coloured blouse - but remember this look is about quiet sophistication, the cut and fabric is eye-catching enough, a loud print is not needed.

Warehouse have a beautiful navy Swallow Print Blouse, £55. Alternatively, Reiss has some exquisite lace blouses and military shirts ranging from a dove grey to a fuscia pink, starting at £79.

It's time to get hot under the collar!