Conversation so far:
What operas did Jeanette MacDonald perform in?
Jeanette MacDonald made her opera debut singing Juliette in Gounod's Roméo et Juliette in Montreal at His Majesty's Theatre.
What other operas did Jeanette MacDonald sing in besides Romeo and Juliet?
Jeanette MacDonald also sang Marguerite in Gounod's Faust with the Chicago Opera.

Question: Were her performances popular?
Self-contained rewrite: Were Jeanette MacDonald's performances popular?