《birthday cake》的詞曲作者和歌曲語言和演唱者均不詳，但可以提供歌曲的大致旋律和歌詞。
歌詞大致如下：
第一小節：
Today is your birthday, you are a year older
But the world is still here, full of color and joy
So let's celebrate with a birthday cake
And remember, life is worth living every day
副歌：
Celebrate with a birthday cake, sing a happy song
Make a wish and blow out the candles
Life is beautiful, let's enjoy it together
Celebrate with a birthday cake, let's make the most
這只是一個大致的版本，可能存在差異。真正的《birthday cake》歌詞和旋律可能需要通過更多的渠道來獲取。