The end credits song for the The Hobbit: The Desolation of Smaug sometimes make me come close to tears because of how beautiful it is. ;-;
It's so perfect, and and when Bilbo says, "What have we done...?" at the end, and then, "Ooohhh Misty eye of the mountain beloooowww.... Keeeeeeeeep careful watch of my brother's soul."