Also from Toy Story 2, "When She Loved Me". An utterly heartwrenching song by Jessie that was said to have made both Tim Allen and Tom Hanks tear up during the premier.
"Fixing Wall-E" While not Crowning Music of Awesome per se, the beginning gets this troper every time.
The Axiom is also a fantastic score. The parts that play when WALL-E and the spaceship are flying past the lunar rover and flag on the Moon, and then through the rings of Saturn, are almost impossibly beautiful.
It's surprisingly dark and scary for a Pixar film, but Swim Down is amazing. Starts off dark and hopeless but erupts into triumph at the end. It helps that this and 'Fronds like These' follows it on the soundtrack too.
The four-minute-plus "Married Life" underscores a dialogue-free montage that follows Ellie and Carl from the altar to Carl's arrival home after Ellie's memorial service — whimsical, lyrical, and heartbreaking.
"Carl Goes Up". "So long, boys! I'll send you a postcard from Paradise Falls!"
"Paradise Found", in which the clouds part to reveal Paradise Falls and the rest of the plateau in all their glory.
...and basically everything from that point to the end of the credits.
And you can't forget about Escape from Muntz Mountain or Memories can Weigh you Down or that storm song. And everybody's theme at one point sounds epically awesome. Yes, even Russell's, which doesn't sound like much at first in 52 Chachki Pickup.
Really, it's no wonder this won the Oscar for Best Original Score.