Michael:
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.
Michael and Bart:
Lisa, it's your birthday.
Happy birthday, Lisa.
Lisa, it's your birthday.
Happy birthday, Lisa.
Michael:
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.
Michael and Bart:
Lisa, it's your birthday.
Happy birthday, Lisa.
Lisa, it's your birthday.
Happy birthday, Lisa.
Bart:
Yeah!
This was actually in an episode of the Simpsons. Mike played a guy who thought he was Michael Jackson and Bart got him to sing it for Lisa. Thats where it was from.