In late October 2012, Cuoco enlisted the help of her sister Briana to organize a flash mob on the set of the show, in which she and the cast and crew surprised the studio audience by suddenly lip syncing and dancing to Carly Rae Jepsen's song "Call Me Maybe". A video of the event was posted on YouTube and became a viral success. A clip from the performance was also played during Cuoco's January 8, 2013 appearance on the late-night talk show "Conan".