Taylor Swift's lucky number is 13 - her Twitter handle is @TaylorSwift13 - and she wrote the number on her wrist before her complicated Academy of Country Music Awards performance Sunday night.
She started in a white dress, flew over the audience standing on platform, stripped off the dress to reveal a black top and jeans, and hit the stage to jump around and crowd surf. All while singing.
Visible for luck was the 13, written in eyeliner on her left wrist. Below are pictures, scroll all the way for video.