other than that cameron diaz has impressed me more than once, holding her own in a few flicks i thought she would fall down in. throw in the fact that she's also rather nice & the varied choices of film genre, and it's a close second.
Naomi Watts looks like The Bright New Thing of the moment - she was fantastic in *Mulholland Drive* and is in a couple of things just out - *The Divorce* (with Kate HuRABon, who was absolutely brilliant in *Almost Famous* at least) and somehting else, but I've forgotten.