Let`s Party! (Two of a Kind, Mary-Kate and Ashley, # 8) : Ashley has a great idea! She's going to give a surprise party for her best friend, Jennifer. But Ashley gets a surprise when she finds out her sister Mary-Kate is giving a party for HER best friend Amanda - on the same night. But the biggest shocker of all is the one Dad has for both of the girls - one that's going to change their lives big time!