Who sand He's Bigfoot?
CREATE TABLE "table1_23667534_1" (
  "episode_title" text,
  "song_s_title" text,
  "writer" text,
  "singer_s" text,
  "album_s" text
);
SELECT "singer_s" FROM "table1_23667534_1" WHERE "song_s_title"='He''s Bigfoot';