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The new sleek look for men's hair

The popularity of "Mad Men" has fueled sales of '60s-era suits and sleek, short haircuts, but the undercut actually dates back to the '20s. And the look likely will gain more traction, thanks to Prohibition-era shows like HBO's "Boardwalk Empire," and the hotly anticipated "Great Gatsby" remake, starring Leonardo DiCaprio and Tobey Maguire.