The Lucy Show Season 2 Episode 18
When Lucy happens upon Ethel Merman at the bank, then Ethel and Mr. Mooney must make up a fake name and tell Lucy that she only looks like Ethel Merman. Soon after, Lucy is in need of money, as usual, and decides to let this Ethel Merman look alike rent a room. Soon after Lucy is giving her lessons how to perform and sing like Ethel Merman.
Serie: The Lucy Show
Episode Title: Lucy Teaches Ethel Merman to Sing
Air Date: 1964-02-03