CREATE TABLE table_24423 ("Week #" TEXT, "Theme" TEXT, "Song choice" TEXT, "Original artist" TEXT, "Order #" TEXT, "Result" TEXT)

What week #(s featured sara bareilles as the original artist?
SELECT "Week #" FROM table_24423 WHERE "Original artist" = 'Sara Bareilles'
SELECT "Week #" FROM "table_24423" WHERE "Original artist" = 'Sara Bareilles'