Natural blondes make the best redheads. It's unfortunately just about the only way you ever get the red haired hawtness without the freckle nawtness.
Nearly said redeads up there.
I don't know if I could pick two. There are a lot of hollywood ladies I find attractive, even knowing how much movie magic is going on (makeup, lighting, padding, etc.). On the other hand, there's also inevitably some movie in which someone I normally find irresistible looks awful to me, driving home just how much fakery is normally going on.
Oddly enough, even though I can't pick two, I can pick one: Eva Mendes.
I'd pick that cartoon girl from esurance commercials, but I don't know how that would work, logistically.