Heh, I'm not actually sixteen going on seventeen, but yay Sound of Music!

Re: Amanda. It really depends. Like, if Amanda announced to the class, "Okay guys! I'm having a REALLY COOL birthday party! It's going to be great! But only these people can come, because they're the only ones that are good enough." Then... yeah, that's a problem. But if she just quietly passed out invitations at recess, I don't think there's anyhthing to get worked up about.