They're rich, famous, good-looking, talented — and, most importantly, single! While George Clooney
and Leonardo DiCaprio
have famously embraced bachelorhood over the years, a new crop of unattached celebs have made their claim to foot-loose-and-fancy-free fame. From Zac Efron to Michael Fassbender, Hollywood's most desirable bachelors reigned supreme in 2012.