You look just like.....

I realize now that telling someone they look like a famous person is not always a compliment.  At Sushi last night, when the waitress greeted us, she said, "Wow, has anyone ever told you you look just like Britney Spears?"  I said, "I hope pre-breakdown!"  She laughed and said, "Oh yeah, before she gained weight."
Hmmm.  I guess I should say thank you??