Nice top 10 lists... here's mine, with one item: looks plus brains plus sense of humor plus no surgical enhancement, in no particular order:
Angelina Jolie (talk about just sheer raw sexual energy .. before she even smiles)
Katherine Heigl (5'9" blonde bombshell, Roswell & Grey's Anatomy)
Jessica Alba (also 5'9")
Evangeline Lilly (any question as to why ... check Kate on Lost)
Heather Stewart-Whyte (gorgeous British model)
Tyra Banks (can you blame me? ... sexiest woman of African heritage)
Alison Armitage (British model ... posed in Playboy under the name Brittany York)
Michelle Rodriguez (she just strikes as the most laid back chick to hang with)
Yoon-jin Kim (Korean actress from Lost who portrays Sun)
Holly Marie Combs (yes, actress from Charmed who plays Piper, funniest most down to earth female celebrity I've seen until Evangeline showed up)
I do have alternates such as: Maggie Grace (Shannon on Lost), Jennifer Connelly, Jessica Biel, Eva Longoria, Peta Wilson (6' Australian blonde from La Femme Nikita and LXG), Halle Berry, Monica Bellucci (very painful but she gets bumped -- #1 alternate believe me), Lisa Snowden (British model & actress), Jessica Simpson, and Ellen Pompeo (also on Grey's Anatomy & Old School)