Curtin appeared in the star-studded version of "Put Down the Duckie" on Sesame Street. Although she didn't sing in the segment, an additional verse of her singing did appear during the end credits for Sesame Street, Special.
In Season 16, she appeared in Episode 2033 of Sesame Street, portraying Cinderella. One scene featured her with the Two-Headed Monster, singing the alphabet. A snippet of this appearance was included in Stars and Street Forever
In 1989, Curtain served as the host for the mini-documentary, The Sesame Street Experiment.