Answer the following question: Given the following passage  "Much of the music recorded by singer-songwriters such as Diana Ross, James Taylor, Carly Simon, Carole King and Janis Ian got as much, if not more, airplay on this format than on Top 40 stations. Easy Listening radio also began including songs by artists who had begun in other genres, such as rock and roll or R&B. In addition, several early disco songs, did well on the Adult Contemporary format.",  answer the following question. Note that the answer is present within the text.  Question: Which singer-songwriter mentioned has the shortest last name?
Answer:
Janis Ian