When Anne Hathaway sang I Dreamed A Dream in Les Mis. And the ending of it too.
Hatchiko is also a give in too. I thought that parts of The Help were too, especially the bit where Celia and her husband cook Minny dinner, and the ending with Abeline. Ugh.
But probably the worst thing was Dancer In The Dark. I know it's a film with Björk and I'm biased etc, but the ending of it killed me and I was a sobbing mess it was absolutely horrible: