Yvonne Lewis is a session singer and voice actress who has been heard on Sesame Street and in related albums in various singing roles. In one of her earliest collaborations, she was one of "The Girls," the Anything Muppet trio who backed up Cookie Monster on "Me Lost Me Cookie," and she filled the same function on the albums Sesame Street Fever and Sesame Disco. Later, in the 1990s, she voiced one of the Squirrelles, in addition to countless one-shot chorus Muppets and off-screen vocals.