De acuerdo con una entrevista, los Beatles se reunieron para ver la película Una Rubia en la Cumbre (The Girl Can?t Help It). Al terminar de verla, usaron esa inspiración para terminar esta canción esa misma noche.
You say it's your birthday
it's my birthday too--yeah
they say it's your birthday
we're gonna have a good time
i'm glad it's your birthday
happy birthday to you.
Yes we're going to a party party
yes we're going to a party party
yes we're going to a party party.
I would like you to dance--birthday
take a cha-cha-cha-chance-birthday
i would like you to dance--birthday
dance
You say it's your birthday
well it's my birthday too--yeah
you say it's your birthday
we're gonna have a good time
i'm glad it's your birthday
happy birthday to you.