CREATE TABLE table_72721 ("Week #" TEXT, "Theme" TEXT, "Song choice" TEXT, "Original artist" TEXT, "Order #" TEXT, "Result" TEXT)

Name the week number for andrew lloyd webber
SELECT "Week #" FROM table_72721 WHERE "Theme" = 'Andrew Lloyd Webber'
SELECT "Week #" FROM "table_72721" WHERE "Theme" = 'Andrew Lloyd Webber'