What can a guy wear at home to be sexy?

My girlfriend has been away for a bit for work and is coming over tonight. I already know we're going to have sex, but I want to wear something that when she walks in, she will want to rip off whatever I'm wearing.

I plan on wearing a nice pair of Celvin Klein underwear (which i know she loves), but I don't know what type of shirt/top I should wear.

Ladies, what would the lingerie equivalent for a man be that would turn you on if you came home to him wearing?