Of course, how could you not! Just off the top of my head:-
Watership Down - Bright Eyes. Need I say more? This film traumatised me as a child. I've never seen it since, and will never watch it again.
Toy Story 2 - Jessie remembers her owner abandoning her with "When She Loved Me" by Sarah McLachlan playing.
Toy Story 3 - The toys realise they are gonna be destroyed and they all stand holding each other awaiting certain death.
Up - The first 15 odd minutes.
The Lion King - Mufasa dies and Simba finds him and calls for help.
Bambi - His mother is shot and killed and he calls out for her.
Dumbo - His mother is locked up and she holds him through the bars of her cage and sings to him.
Monsters Inc. - Basically the last 10 minutes of the film where Sully leaves Boo home and the very end when she sees him again.
There are plenty more I'm sure, but the longer I think about it, the more I can feel myself wanting to cry, so I'll stop there!