Being a twin has its perks (especially when your twin is a boy). This year, Willow and Winston are holding their first ever co-ed birthday party, and everyone in class is invited. Thismeans Win s cute friend Jacob is on the guest list. Willow s pumped that her crush will be coming over and gets the Sleepover Girls to help her plan a party that s all kinds of awesome But even the best-laid plans can go awry. Jacob seems tolike Ashley, and mean girls Franny and Zoe are driving Willow nuts. Can the birthday girl pull it together and throw a memorable party, or will her birthday be a complete bust?"