Birthday: Jan. 5, 1978
Hometown: Sioux Falls, S.D.

How You Know Her: While you probably know January Jones best as the long-suffering Betty Draper on Mad Men, this former Dairy Queen hottie has been front and center in movies such as American Wedding and We Are Marshall. Jones will get your rocks off again this month in her new film, Pirate Radio, about a ship full of hot babes and pirate DJs. We'll take a one-way ticket there.

Go ahead, jump: "I was in lingerie on a trampoline and I had to jump into the air for eight hours. My legs were starting to buckle." We're not sure what January was referring to when she said that, but we don't care. Lingerie + jumping = math we like.

Check out more hot pics of January here!

January Jones

January Jones

January Jones

January Jones

January Jones

January Jones