有个帖子也问过这个问题了，chelseafox这位网友帮我们解答了。我转载下他的原话吧。
第一次出现在第四季第十集The One With The Girl From Poughkeepsie，第二次出现在第九季第十集The One With Christmas In Tulsa，是以回放的形式出现的。
Phoebe: So here is a, a very special holiday song that I wrote for some very important people to me. (singing:)
"Went to the store, sat on Santa's lap.
Asked him to bring my friends all kinds of crap.
Said all you need is to write them a song.
Now, you haven't heard it yet, so don't try to sing along.
No, don't sing along.
Monica, Moncia, have a happy Hanukkah.
Saw Santa Claus, he said hello to Ross.
And please tell Joey, Christmas will be snowy!
And Rachel and Chandler, have err-umm-glander!!"
Happy holidays, everybody!
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