Conversation so far:
What show was Ruth best known for performing on stage ?
Etting made her Broadway debut in the Ziegfeld Follies.
Was she a dancer ?
she later remembered she was not a very good dancer.
What films did she act in ?
Roman Scandals.
Was she an actress or a singer in the film ?
Etting had only two lines in the film and sang just one song.

Question: What did she perform on the radio ?
Self-contained rewrite: What did Ruth Etting perform on the radio ?