We apologize if this headline implied you were going to be seeing something else here. Sorry, we're just talking about what she wore to her 27th birthday party last night.

However, if Britney Spears nude was what you were expecting, this photo should give you a bit of a preview, as she appears to have forgotten the other half of her dress.

Here's Britney doing her best Scarlett Johansson impression ...

27 AND LOVING IT: Britney Spears celebrates her 27th birthday in style. We're a little surprised papa Jamie green-lighted this outfit, but hey, no complaints!