Leon Kompowsky: Lisa, it's your birthday God bless you this day You gave me the gift of a little sister And I'm proud of you today. Leon Kompowsky and Bart: Lisa, it's your birthday Happy birthday, Lisa Lisa, it's your birthday Happy birthday, Lisa. Leon Kompowsky: I wish you love and good will I wish you peace and joy Bart: I wish you better than your heart desires Michael: And your first kiss from a boy. Leon Kompowsky/Bart: Lisa, it's your birthday Happy birthday, Lisa Lisa, it's your birthday Happy birthday, Lisa Bart: Yeah!