While we can't claim direct access to Mel B's thoughts at the moment this picture was taken, we can assure you that she is making the exact same face that we did when we realised Katie Price had mistaken a pair of sparkly tights for trousers at The Hunger Games UK premiere.
Photo: Rex
Astronomy sidenote: The sprinkling of glitter on the left hand side of her posterior is reminding us of the Trifid Nebula