Cidny Bullens (born March 21, 1950) is an American singer and songwriter who grew up in Massachusetts. He released two albums in the late 1970s on United Artists and Casablanca and another in 1989. His 1978 debut album, Desire Wire is described flatly by William Ruhlmann in allmusic as: "One of the great lost rock albums of the '70s, Bullens' debut release is full of tough, passionate, incredibly catchy rock & roll played to the hilt and sung with fire". His early albums anticipated later work by a host of 1980s female and female-identified rock artists, from Pat Benatar, to Blondie, to the Go-Go's, to Headpins.

He provided background vocals as one of the Sex-o-lettes on the 1974 album Disco Tex & the Sex-o-lettes. He provided vocals on three songs ("It's Raining on Prom Night," "Mooning," and "Freddy, My Love") on the soundtrack of the 1977 feature film, Grease. His performance on the soundtrack earned him a Grammy Award nomination for best rock vocal performance.