Final answer:
Finn should study Ella Fitzgerald, an influential jazz vocalist with a long and successful career.
Explanation:
The influential jazz vocalist with a long and successful career that Finn should study is Ella Fitzgerald. Fitzgerald became world-famous as a jazz vocalist and recording artist, enjoying a illustrious career as one of the leading jazz recording artists of all time.
Learn more about Jazz vocalists and musicians here:
https://brainly.com/question/39217681
