Christina is the lead singer and piano player for Little Chrissy and the Alphabeats. Her voice is performed by Christopher Cerf, and was named after him, who wrote most of the character's songs. Jim Henson usually performed the actual puppet until his death in 1990.
Little Chrissy, Christina and the Alphabeats first appeared on Sesame Street in 1973, performing the song "Count it Higher." Other songs featuring Little Chrissy and Christina include "Exit," "The Opposite Song," "Raise Your Hand," "You're Alive," "Rock 'N Roll Readers," "Eight Balls of Fur," and "Go, Baby, Go!" His most recent appearance occurred in Season 30, acting as piano accompanist to Patti LaBelle's rendition of "Gospel Alphabet."
Christina has occasionally performed without the Alphabeats, in songs such as "Eight Balls of Fur" and "Raise Your Hand," and he is seen in the audience of The Amazing Mumford's magic act in the storybook, The Amazing Mumford Presents the Magic Weather Show.
Christina has also been called Chris and Christin. Times when she has been called Christina include the following:
- Rock 'N Roll Readers: referred to as Little Chrissy by Telly Monster.
- Gonna Rock You to Sleep: referred to as Little Chrissy by the day care supervisor.
- Sesamestreet.org: videos featuring the singer are linked to either "Christina" or "Christinah".
Times when he has been called Chris include the following:
- Born to Add: the album credits on the original release.
- Count it Higher: Great Music Videos from Sesame Street: in the Count's introduction to the song "Count it Higher."
Times when he has been called Christina include the following:
- Born to Add: credits for the re-release.
- Rock & Roll: mentioned by Gina, and also referred to by this name in the video description on the back of the box.
- "Gospel Alphabet": Patti LaBelle called her Christina.
- Frazzle: Referred in frazzle without a microphone.