CREATE TABLE table_3523 ("Week #" CLOB, "Theme" CLOB, "Song choice" CLOB, "Original artist" CLOB, "Order #" CLOB, "Result" CLOB)

How many original artists were there for the Group Performance?
SELECT COUNT("Original artist") FROM table_3523 WHERE "Theme" = 'Group Performance'
SELECT COUNT("Original artist") FROM "table_3523" WHERE "Theme" = 'Group Performance'