Answer: St. Bernadette's
Cha Cha, the character from the movie Grease, is from St. Bernadette's school. Interestingly, the actress who played Cha Cha, Annette Charles, was actually a trained opera singer and had to learn how to lip-sync for her performance of "Born to Hand Jive" in the movie. Additionally, the dance sequence for "Born to Hand Jive" took three days to film and required over 500 extras.