With order number 7 and the theme is Motown, who were the original artists?
CREATE TABLE "performances_results" (
  "week_num" text,
  "theme" text,
  "song_choice" text,
  "original_artist" text,
  "order_num" text,
  "result" text
);
SELECT "original_artist" FROM "performances_results" WHERE "order_num"='7' AND "theme"='Motown';