Aww, when you said a celebrity out, I thought you meant a homosexual relationship. Or did we already do that?
Ahh screw it, I'll answer the question that way anyhow. My obvious response is Johnny Depp, though I've made no secret that I'd take a crack at NaShawn Kearse if given the opportunity.

If ye still seek the hetero answer, it would have been Sarah Michelle Gellar back when she was younger. Yup.