Science whiz Alexis is out to prove that cupcakes are healthy in the latest addition to the Cupcake Diaries series. Alexis thinks she has the perfect project to win the Science Fair—she’s going to prove that cupcakes are good for you! But all thoughts of the school competition go out the window when she spots her crush walking home with another girl. Maybe she should have whipped up a love potion instead! Meanwhile, the girls are challenged to make rock and roll cupcakes for Martine Donay’s sweet sixteen—and she is anything but sweet! Cupcakes with black icing, anyone?