Which episodes of Gossip Girl includes a celebration of someone's birthday??

It's my birthday in a couple of days and in that celebration I'd really love to watch a lot birthday episodes of my fave tv shows but mostly from GG since it's my fave :D

So I thought that you awesome fans could help me with finding some of them... I already know "Seventeen Candles", which is a TOTAL go, because I turn seventeen myself xD

Thank you to everyone who will answer my request, xo xo Maria Magdalena <3