以下是《Happy Birthday》的歌詞：
Happy birthday to you
祝妳生日快樂
Happy birthday to you
祝妳生日快樂
Happy birthday dear XX
祝妳生日快樂
Happy birthday to you
祝妳生日快樂
Here's to your smiling face
為你微笑的面容乾杯
And all the joy you bring
以及你帶來的所有快樂
Every day is a new day
每一天都是新的一天
With you, it's a celebration
有你在，就是一個慶祝
Happy birthday to you
祝妳生日快樂
Happy birthday to you
祝妳生日快樂
From the tip of your hair to the ball of your toe
從你的髮尖到你的腳尖
You are wonderful just the way you are
你是這樣美妙，就是這樣的你
So happy birthday to you
所以，祝妳生日快樂
以下是《Happy Birthday》的歌詞五次方：
Happy birthday to you, you, you, you, you!
祝妳生日快樂，妳，妳，妳，妳！
Happy birthday to you, you, you, you, you!
祝妳生日快樂，妳，妳，妳，妳！
Every year on your special day, let's sing a song of cheer!
每年的特殊日子，讓我們唱起歡快的歌曲！
Happy birthday to you, you, you, you and all your friends!
祝妳生日快樂，你，你，你和你的朋友！
Here's a gift that I hope you'll appreciate!
這是一份我希望你會欣賞的禮物！
Every day and every year, may your life be filled with happiness!
每一天和每一歲，都讓你的人生充滿幸福！
這首歌非常溫馨和友善，是給每個人的最好禮物。在慶祝特別的日子時，請為每一個人唱起這首歌，讓我們一起為每個人的生日帶來快樂和喜悅！