What it says on the tin, Amy Pond cosplay from The Hungry Earth.
I would have preferred to use dance tights, but even in the episode you can see the control top of her hosiery so mwah. Most people at con didn't know who I was since the majority of my Who group were in other costumes and competing that night. Still, I got complimented on the outfit at least, rofl.
Amy Pond, Doctor Who © BBC