When I had dark hair I occasionally got Halle Berry, though only from strangers (specifically eyes and smile, as the rest of her is so far superior as to negate comparison). But the only one that makes any sense to me is Bristol Palin pre-jaw surgery. She actually has a much skinnier nose than me and different colored eyes, but I get it. I remember going to vote during the last election and having five or six people comment on how I looked like that "Sarah Palin's daughter". I wasn't thrilled.
However I did discover a twin when playing the FB doppelganger game, she just isn't famous anywhere but Asia. Her name is Tata Young and she's a half Thai half American singer and in pictures where she is smiling I look so much like her that when I put up her picture as my "famous doppelganger" my dad didn't realize it wasn't me.
ETA: Can't find the picture that fooled my dad, but I would say this looks a whole lot like me:
