Peek a Boo

(Apologies for the terrible headline that belongs in The Sun)

All girls obsess over their underwear, so it seems like a logical trend that having a bra poking out from underneath a sheer top would become a trend. Admittidely it's not for everyone, but if done right I think it can look very cute and flirty. One of the best red carpet examples I've seen so far is on January Jones:

I'm sure Betty Draper wouldn't approve, but by keeping the look all one colour, and having details on the pocket, it makes what can be a very bold look alot more subtle and intriguing.

On the runway, the looks have varied from Balenciaga having a flash of lace underneath a power suit:
Repressed romance at Miu Miu:
But it was Givenchy that lead the way with using a bra as a top trend, which has had a huge influence on the editorial scene:

(images from thefahionspot. taken from; W September 2009, Vogue Espana 2009, i-D Pre Fall 2009, Vogue UK September 2009 & Elle September 2009)