That last point bring us neatly on to this one, the now famous Big Bang Theory flash mob. The whole cast and crew surprised the executive producers by performing a flash mob to Carly Rae Jepson's summer hit Call Me Maybe. The interesting part is that Kaley Cuocos sister Bri choreographed the whole thing, and she did such a good job it earned her a job on two of co-creator Chuck Lorres shows. Bri Cuoco played the woman who earns a marriage proposal in the background of a Big Bang Valentines Day episode while she also choreographed a scene with 50 dancers on Two and a Half Men.