Hmmm, actually I have never ranked them :-P. I will have a look at it one of these days. But I'm quite sure the top 5 would contain:
Be prepared, Arabian Nights, Why should I worry, I wanna be like you and Everybody wants to be a cat
{Edit]: Savages (Pocahontas) is a very nice one too :-), some more Aladdin songs too, Chim chim cheree, the bells of notre-dame...