The gang goes to Anna's 13th birthday party only to find trouble,Anna asks out Aaron who says yes, but Teressa feels jealousy but she doesn't know why.Also when Tammy doesn't go to the party because she wasn't invitedd,Colby leaves too leaving a gap in Anna and Colby's friendship.Also Gretchen has second thoughts on going out with Sean when she has a great time with Jared and Aaron.