Harry/Hermione
Laura, Harry's face in Goblet of Fire wasn't dazed and confused. Tell me, if one of your friends was an "insufferable know-it-all" and never knew how to have fun, wouldn't you be surprised to see him or her dressed up for a dance? Harry's face is a look of surprise and joy at seeing his friend, the know-it-all Hermione Granger, settling down from her studies to attend the Yule Ball. The book says mentions that even Harry noticed that Hermione looked beautiful at the ball, but that doesn't mean that he fancies her. And, by the way, the screenwriters for the movies are, in no way, setting any romance with Harry and Hermione up. You never see any instance in the movies where Harry and Hermione show romantic tension.
And to PeaceAngel down there, don't bring up this bullcrap about "HARRY WUZ NEVER SUPPOSED TO BE WITH GINNY." That's your opinion, not a fact, so don't even bother. It's JK Rowling's world, not yours. Harry...