CREATE TABLE table_28504 ("Week #" CLOB, "Theme" CLOB, "Song choice" CLOB, "Original artist" CLOB, "Order #" CLOB, "Result" CLOB)

Who is the original artist of the song choice ' Under My Thumb '?
SELECT "Original artist" FROM table_28504 WHERE "Song choice" = ' Under My Thumb '
SELECT "Original artist" FROM "table_28504" WHERE "Song choice" = ' Under My Thumb '