This week Matthew Williamson hosted a party with Belvedere to launch their latest beverage “Pink Grapefruit”.

He invited his muse and BFF Sienna Miller who really disappointed me.

We are in the mist of a mini heatwave here in London. So I’m shocked that despite having her pick from the 35 Matthew Williamson’s Spring 2010 looks, she opted for a gold mini dress from the Fall 2010. And it wasn’t even one of the prettier pieces.

I like do like the belt she wore with the dress along with her Camilla Skovgaard cut-out platform wedge boots, but it’s summer. Let’s celebrate it.

The Brit actress has recently proved she can’t kick her Jude Law obsession, and here she also proves that she can’t kick her Prada Saffiano & Tessuto tote obsession either.

Sienna has been carrying this tote since summer 2009, and it looks like it will be her summer 2010 bag too.

Love the new bangs though.

Little Boots aka Victoria Hesketh also opted for Fall 2010 dress and ironically wore sunglasses with her Autumn bronze look.

Very uninspiring.

Credit: Style.com & London Features