Name the order number for 1960s
CREATE TABLE "table1_19508635_1" (
  "week_num" text,
  "theme" text,
  "song_choice" text,
  "original_artist" text,
  "order_num" text,
  "result" text
);
SELECT "order_num" FROM "table1_19508635_1" WHERE "theme"='1960s';