Yikes so many to choose from, so I'll just rattle off a few of my favorites and provide links to the Youtube videos of said songs.
You Got a Friend in Me.
Movie(s): Toy Story (1995) Toy Story 2 (1999)
I always did particularly like this upbeat little number from Mr. Randy Newman. A nice little song about the meaning of friendship and all of that jazz.
Arabian Nights
One Jump Ahead
Friend Like Me
Movie: Aladdin (1992)
3 shining examples from what I consider to be one of the best soundtracks in any film that Disney has ever made, animated or live action.
Circle of Life
Movie: The Lion King (1994)
The Three words that best describe both the song and the animated sequence it plays over...beautiful...beautiful and beautiful!