Britney Spears fan photo

Umm... can you tell me what is wrong with this picture? Here is a hint. Britney Spears is wearing lingerie at a club. She is taking a picture in a bathroom. The girl on the left is holding a shoe. The girl on the left is wearing a scarf. The girl on the left is wearing the opposite kind of outfit as Britney Spears.
[IDLYITW]