So, I was looking over some youtube faves, and ran across this:
http://www.youtube.com/watch?v=dY5v9tt62IY
(Siren scene from O Brother Where Art Thou?)
I don’t remember feeling it when I first saw the film, but damn… The seductiveness of the singers is just incredible.
Anyone else have any nominees they want to share?
The scene from “Unfaithful” where Diane Lane’s stomach and thighs just tremble.
Jennifer Connolly in Dark City, doing her torch singer routine. Ye gods! http://www.youtube.com/watch?v=ZFZaiuySd5M
You know, I rarely find youtube comments to be worth quoting - but this one is right on the money: “Barbara Stanwyck was hot enough to singe asbestos.”
Wow. Just wow.
Salma Hayek’s snake dance in From Dusk Till Dawn
All the youtube vids of it are disappointingly dark.
That was a bit wow. 
Oh, God! I could not agree more with the “Phone Scene!” I came in to post the scene from “Living Out Loud,” when Holly Hunter is dancing with all of those women at the lesbian bar.
Lowbrow entry:
http://www.youtube.com/watch?v=fOmjVez0iRQ&feature=related
Jennifer Connolly 5 minute mark FTW!
William Holden and Kim Novak dancing in “Picnic”. Fully clothed, and not even touching one another; yet the sensuality is over the top.
The chess match in The Thomas Crown Affair.
“Cor blimey!”