As one of Bollywood's most beloved playback singers, Sunidhi Chauhan isn't seen on-screen for her most famous performances. But when Anushka Sharma cavorts with Shah Rukh Khan as her comic foil in the video for "Dance Pe Chance" from Rab Ne Bana Di Jodi, or when Katrina Kaif shows off some sensual, superhuman dance moves in the clip for "Kamli" from Dhoom 3, every ounce of their energy is matched by Chauhan's larger-than-life voice.