Knock Knock Who's there? Alva! Alva who? Alva heart! Knock Knock Who's there? Alvin! Alvin who! Alvin a great time, how about you? Knock Knock Who's there? Allan! Allan who! Allan-d of Manhattan! Knock Knock Who's there? Allegra! Allegra who? Allegra is broken! Knock Knock Who's there? Alma! Alma who? Alma-ny Knock Knock