One of her most notable appearances on the show was in a sketch where she sang the alphabet with Kermit. As the song progresses, she kept replacing certain letters with "Cookie Monster". The sketch has been used in a number of specials and clip shows as one of Sesame Street’s most memorable moments.
Other sketches with Kermit involved her counting to 20, discussing body parts, and demonstrating up and down. On the Street, she appeared with Mr. Snuffleupagus reciting the alphabet, and in Episode 0597 when Bob sings "Hi Friend".
According to Sesame Street Unpaved,
“Although she looked young, she was twice the age of the average viewer, so she knew the answer to most of the questions being asked on the show. One day, while taping a "One of These Things" sketch, Joey kept giving the correct answer before the song was over. The show's producers took her out of the scene, and decided to put in some children who didn't know all the answers.”