迪斯尼动画片《小美人鱼》里爱丽儿把声音给老巫婆的时候，有一小段音乐特别好听，那是一段专门配的旋律还

这问题我刚巧知道答案(*^__^*) 嘻嘻……
因为《小美人鱼》看过两三次了。所以有印象。

首先，整部片有一首主题曲，在全片中以不同的方式表现，但为同一旋律。这首歌叫《part of your world》就是爱丽儿唱的那首了。

而你所说的这一小段也是由这首歌略微做变化得来的。
http://mp3.baidu.com/m?tn=baidump3&ct=134217728&lm=-1&word=unfortunate

我只找到了那巫婆唱的歌的mp3，中间既有你所要的那一小段曲子。那么一小段应该没有独立截取的资源吧！
如果要这几首歌的歌词可以再找我喔。O(∩_∩)O~

是这首《Poor Unfortunate Souls》就是爱丽儿把声音给老巫婆时候的歌

Kiss The Girl(小美人鱼插曲) 打印此页
歌手：Samuel E. Wright
Samuel E. Wright - Kiss The Girl
《小美人鱼》(The Little Mermaid)插曲

There you see her
Sitting there across the way
She don't got a lot to say
But there's something about her
And you don't know why
But you're dying to try
You wanna kiss the girl

Yes, you want her
Look at her, you know you do
Possible she wants you too
There is one way to ask her
It don't take a word
Not a single word
Go on and kiss the girl

Sha la la la la la
My oh my
Look like the boy too shy
Ain't gonna kiss the girl
Sha la la la la la
Ain't that sad?
Ain't it a shame?
Too bad, he gonna miss the girl

Now's your moment
Floating in a blue lagoon
Boy you better do it soon
No time will be better
She don't say a word
And she won't say a word
Until you kiss the girl

Sha la la la la la
Don't be scared
You got the mood prepared
Go on and kiss the girl
Sha la la la la la
Don't stop now
Don't try to hide it how
You want to kiss the girl
Sha la la la la la
Float along
And listen to the song
The song say kiss the girl
Sha la la la la
The music play
Do what the music say
You got to kiss the girl
You've got to kiss the girl
You wanna kiss the girl
You've gotta kiss the girl

《小美人鱼》里有很多歌，最有名的是，其它的你去搜狗音乐盒找找，这个音乐网站还是很全的。
希望能帮到你。