Beyonce's "Single Ladies" may be old news, but it gets me every time I see someone do this dance. In this case, about 100 dancers got together in a Trident Gum-sponsored flash mob to strut their stuff. I watch this, and my inner librarian rips off her glasses, puts down her hair, throws on a one-shouldered bathing suit with heels, and begins to dance wildly. (Yeah, I know — I'm a dork.) But are they as good as this guy?