6. Holly Madison, UFC, Astoria, Ore.

Hef's main girl from back in the day has proven she's more of a fighter than a lover since the break-up. Well, kinda. She first made an appearance as a guest Octagon Girl at UFC 100 in 2009 then again at UFC 125. She's even launched her own UFC clothing line. Our advice on this venture: Remember, less is more.