《Birthday Song》的歌詞由Carole King填寫，以下是歌詞：
Happy birthday to you
Happy birthday to you
Happy birthday dear [名字]
Happy birthday to you
We've gathered here today
To help you celebrate
The big day that you've waited for
Your very special special day
So blow out your candles
And make a wish again and again
And hope your dreams come true
On your very special birthday
Happy birthday to you
Happy birthday to you
Happy birthday dear [名字]
Happy birthday to you
You've grown up so fast
It doesn't seem possible
But now it's time for all your wishes to come true
Soon you'll be on your way
To your own future dreams
So remember all your memories
Today is your day
Happy birthday to you
Happy birthday to you
Happy birthday dear [名字]
Happy birthday to you
Now [名字]，this gift is for you, from all of us here,
Please open it and enjoy, and remember, always be happy.
Soon the candles will be blown out and the party will be over,
But the memories will last forever, so happy birthday, dear [名字].
以上就是《Birthday Song》的歌詞，希望對你有所幫助。