In which week # was the original artist of Barreto's song choice was Leila Pinheiro?
CREATE TABLE "performances" (
  "week_num" text,
  "theme" text,
  "song_choice" text,
  "original_artist" text,
  "order_num" text,
  "result" text
);
SELECT "week_num" FROM "performances" WHERE "original_artist"='Leila Pinheiro';