Awkward! It's really really hard for emotions to seem genuine. It's not enough to just copy the copy, but then you have to HAVE the copy, because otherwise how would you know exactly what someone's face is DOING when they're laughing or crying, or whatever. So here are two different versions, with slightly different media, neither of which quite "do it," but alas, practice is necessary.
(And I just made a new tag--"extreme emotions", which makes for an interesting collection. Almost all of them are joy. Doesn't that say something about me?)