Into what vortex did I slip seven years ago that I missed this thread? I love Disney songs.
The Lion King will always be the supreme Disney movie for me, and the music's a big part of that. The Circle of Life, Can You Feel The Love Tonight, Hakuna Matata, and I Just Can't Wait To Be King are all blow-away classics, and although Be Prepared isn't quite as hard hitting (because of its style) it's just as great. Scar is awesome.
Other favorites of mine are:
You'll Be In My Heart from Tarzan,
Colors Of The Wind from Pocahontas,
Candle On The Water from Pete's Dragon,
A Whole New World and Prince Ali from Aladdin,
The title song from Beauty And The Beast,
The title song from Puff The Magic Dragon,
King Of The Swingers and The Bare Necessities from The Jungle Book,
Kiss The Girl from The Little Mermaid,
Supercalifragilisticexpialidocious and Chim Chim Cheree from Mary Poppins,
When I See An Elephant Fly from Dumbo,
and of course
Ugly Bug Ball.
I've also got a soft spot for Never Smile At A Crocodile from Peter Pan and We Are Siamese from Lady And The Tramp, which we sang in our final Christmas performance in primary school along with Following The Leader (from Peter Pan), King Of The Swingers and Zippity Doo Dah.