Sidney and Carrie's friendship is being put to the test. Can Lisa Thompson's uplifting duo learn to compromise in time for their joint birthday party? Best friends Sidney and Carrie are really excited about having a joint birthday party! But excitement turns to disappointment when they can't agree about the invitations, the entertainment or even the kind of cake they'd like to have. Will the birthday party be a disaster or can the two friends find a way to compromise that will make them both happy?