While I'm always looking like "somebody's cousin", the two folks I can recall that people say I have looked like are Dawnn Lewis (from A Different World) and Lisa Leslie, center for the LA Sparks.
I think people said Dawnn because we have similar smiles (wide) and maybe similar eyes.
I was in Puerto Vallarta a few years back and the Mexican guys at our hotel were saying "Lisa Leslie, Lisa Leslie, come here." What was doubly funny was that one of the guys we were with they said looked like Michael Jordan (darker skin, bald head) and my other friend was told he looked like: AC GREEN

. Worst though, my girlfriend asked them "who do I look like?" There were blank stares all around!
Folks think I probably look like Lisa because I have long hair, and long legs, (although I'm pretty short) we're around the same skin complexion and our lips are kind of similar.