CREATE TABLE table_204_889 (id DECIMAL, "date" TEXT, "week  ( stage ) " TEXT, "song choice" TEXT, "original artist" TEXT, "theme" TEXT, "result" TEXT)

what was the date of the last free choice performance ?
SELECT "date" FROM table_204_889 WHERE "theme" = 'free choice' ORDER BY "date" DESC LIMIT 1
SELECT "date" FROM "table_204_889" WHERE "theme" = 'free choice' ORDER BY "date" DESC NULLS LAST LIMIT 1