Be a Sweetheart
can certainly take our cleavage cues from Marilyn. She didn't shy away from a plunging neckline, but she bares plenty of skin the right way: vampy, not trampy. If you'd rather opt for a modified Monroe look rather than reach for the nearest halter top, consider showing a little cleave here and there. Just enough to offer a hint of your feminine wiles.
If you aren't game for a sharply dipping blouse front, consider a sweetheart neckline. This style arcs over each breast to create what looks like the top of a heart and is flattering for many body types -- including those of us with curves to keep in check. As Marilyn herself once said, "The trouble with censors is that they worry if a girl has cleavage. They ought to worry if she hasn't any."