CREATE TABLE table_73924 ("Episode" CLOB, "Theme" CLOB, "Song choice" CLOB, "Original artist" CLOB, "Order #" CLOB, "Result" CLOB)

Who is the original artist of the song choice ' The Letter '?
SELECT "Original artist" FROM table_73924 WHERE "Song choice" = ' The Letter '
SELECT "Original artist" FROM "table_73924" WHERE "Song choice" = ' The Letter '