This right here, explains the whole scene when Harry dances with Hermione. It's actually one scene that wasn't in the book that I absolutely loved in the movie, 'cause it showed how much Harry really cares about Hermione as one of his best friends.
Melissa Mccarthy has been one of my all time favorite actresses since she played Sooki on Gilmore Girls. I love how she is so full of life and exudes happiness. She is truly inspirational and sooo funny and just darn cute!