...goes to Samantha Cristoferetti.
Ms. Cristoferetti is an astronaut currently serving a tour on the International Space Station. They don't exactly get to take much luggage up there, it being so expensive to shoot things into space.
So, she definitely gets points for spending part of her valuable weight allowance on: A Star Trek uniform. It's Voyager style, command red, and...yup. Here's the evidence.
I do believe that's the first time a Star Trek uniform has been worn on a real spaceship.