Oh, Posh. Truly, you are magic. This looks like it was never intended to see the light of day unless she has windows in her dressing room. It's just such an unnecessary bid for attention. How many other people as famous as she is – with as many designer connections – would feel the need to show up at a "Woman of the Year" event wearing a repurposed body-shaper? Oh, Posh. "Victoria's Secret" does not refer to you. On so many levels. You are a pretty bad secret-keeper.
We don't know why there is pocket detailing on something that is so clearly not intended to be worn on the outside (to hold her business cards? Her housekeys? Pictures of the kids? Seat liners?), so maybe that is Posh's last great mystery. She needed one, too, now that she's deprived us of the many hours we would sit around pondering the question of what Posh's underbutt cleavage would look like:
Maybe I'm not thinking broadly enough – maybe this is actually a costume. Maybe, in order to provide more interesting footage for her upcoming reality show, Lady Becks is prepping to star as Roxie Hart in a dinner-theater version of Chicago in which she actually has to serve the food as part of the choreography. If that's true, I hope she at least asked the maitre d' before hacking up his uniform jacket.