I threw a surprise Gossip Girl birthday party last year for my ex-friend!!! It was sooo much fun. I made everyone dress up which of course they all complained about at first and then had a ton of fun with. They're asking for a repeat this year. Here's what I did.
Banner saying "Happy Birthday, Darling Alicia" in french
sliver, pale blue, and pale green streamers on the ceiling and hanging down the walls. my roommate ended up liking these so much we kept them up all year.
Candlelight!!!! it sets the mood
I made a cake and put pale blue and pale green fondant on it in polka dots because those are one of her favorite things. i'm not that great with fondant but it looked cute.
made the birthday girl a tiera out of wire and beads
plastic fake flutes for sparkling grape juice
for food, besides the cake, we did a mix of fresh fruit (starfruit, strawberries, raspberries, etc) and candy
after the suprise we pulled out a game cube and played keroke revolution because thats what we do when we "party", but it was fun, nonetheless.
heres the link to my facebook photo album. the beginning you can see the decorations, the rest is just pictures of my friends
hope this helps ! http://www.facebook.com/profile.php?id=2360989&ref=name#/album.php?aid=2558219&id=2360989