Un, Deux, Cha Cha Cha! is the second segment of the nineteenth episode of Fancy Nancy.
Nancy partners up with her Grandpa to compete in a local ballroom dancing competition.
- Frank Clancy sings for the first time with Nancy "Stick to the Steps" while they are practicing the fox-trot for the competition.
- It makes his third appearance the Frank's house since Nancy Clancy, Pet Psychic!.
- It makes his second appearance the rec center since Nancy and the Nice List.
- Gus and Mrs. Devine has dance names (Charlie and Cha-Cha) and also they're the rivals of Frank on the competition.
- Betsy was partner of Frank on the competition, but she moved to Milwaukee.
- Madame Lucille makes her third appearance since La Danse of Friendship and Nancy and the Nice List.
- Frank revealed that he is a ballroom dance champion.
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