What's the happiest happy ending of all time?

Sometimes a dark ending just makes sense. Sometimes you enjoy a bittersweet, melancholic twist. And sometimes, you just want a full-on heart-swelling happy ending where everything is lovely. What's your favorite happy ending from science fiction or fantasy?

Please include a picture or clip, so we can bask in the rosy glow. And mention which book, movie, TV show or comic this comes from. Thanks!