So Katherine Heigl was on David Letterman last night, and she looked really beautiful when she arrived at the studio - check out the snaps below, she's wearing a lovely shiny silk cobalt blue wrap dress with jewel accents on the belt (by Reem Acra). She's a new red head, and as she commented to Dave, she had been blonde for 5 years - since Izzy is bald on the show, it didn't matter, so she decided to make the change.

This is a colour commentary.. this shade of blue is probably one of the most universally flattering shades in fashion today (I don't know anyone who doesn't suit this colour!). There are plenty of dresses to choose from, but also some dynamite accessories. Personally speaking, Anya Hindmarch blue patent Flavie has been on my wish list since it arrived earlier this season. It's a stunning bag.. on screen and in person!

Katherine didn't actually wear this dress on Letterman, she opted for a simple black jersey asymmetric dress (photo below) - and while I won't give anything away, Katherine did.. we were left with a cliff hanger last season, and she totally gave over who lived & who died. Ah well.. at least she looks good! Some lovely blue picks below..