The cast of 'Big Bang Theory' recently performed at "A Night at Sardi's", a charity event for the Alzheimer's Association. Stars Jim Parsons, Johnny Galecki, Melissa Rauch, Kunal Nayyar, Kaley Cuoco, Simon Helberg and Mayim Bialik delivered a memorable performance, dressed in full Grease attire. Kaley Cuoco, however, may have outshone her colleagues with her daring enactment of "Dance 10 Looks 3" from A Chorus Line. Donning an alluring red crop-top, fishnets and microscopic black shorts, the 30-year-old star delivered an impressive, confident performance. She later expressed her exhilaration on Instagram, proclaiming that she "nailed it!". In a conversation with ET, Cuoco attributed her fabulously fit form to yoga, claiming it to be her secret for mental and physical fitness. She, however, humorously added that her motivation to do yoga is to balance out the caloric intake from wine.