Those of you who who caught the Mad Men Season 5 premiere were "treated" to Don's new wife Megan (played by stunning Montréal native Jessica Paré) performing this song for Don as a "birthday present." The discomfort of Don, who hates birthdays, and hates even more the idea of his co-workers in his private space, as well as most of the guests in the room is palpable. ("You could almost see his soul leaving his body," a co-worker says the next Monday morning.) Nevertheless, Paré plays this with such a sweet and natural sexiness, it's just enchanting. (She later complains to Peggy that everyone at the agency is so cynical and jaded, looking to tear each other down.)
Edited to add: Tom and Lorenzo of course distill this down beautifully in their style recap here.
This was where the youthfulness on one side of the room crashed into the adulthood on the other side. It wasn’t that she didn’t understand Don. She understands him better than most of the women he’s been with; that sex scene proved it. What she couldn’t understand was how the older people in the room would view her. To her young friends, she’s fabulous and fun. To the SCDP crowd she was either inappropriate or begging for sex. They couldn’t – none of them – see it as just fun and playful.
Sophia Loren also performed this song in the 1960 film "The Millionairess." Alas, no clips to be found.