When the popular girls club takes interest in Mia, she has to decide between being popular and her new cupcake club friends.

When Alexis develops a crush on Emma's brother, she decides to approach this new feeling in her usual organized manner by conducting research and developing a plan.

Although Mia feels fairly satisfied with her life, she worries about who should attend parent-teacher night and her failing grade in Spanish.

Giving up her role as leader of the Cupcake Club when she feels her organizational skills aren't appreciated, Alexis discovers valuable lessons about leadership and asking for help in the face of disorder, missed deadlines, and dwindling supplies.

Mia tries to make friends with Olivia, the new girl, but when Olivia makes fun of the other Cupcake Club girls and tells Mia she shouldn't hang out with them, Mia must make a decision about her new friendship.

When Sydney moves away and is replaced by newcomer Olivia, Alexis becomes the focus of hurtful teasing by the Best Friends Club and begins to wonder if an offhand remark she made when first meeting Olivia may have been taken the wrong way.

Worrying about her fashion prospects when she learns that she has to get both braces and glasses, Mia receives help from her stylish mom and is reassured by her Cupcake Club friends that she is still the same old Mia.

Alexis feels lonely and left out when Emma goes away on a family trip. Sure, Mia and Katie are her friends too, but without her BFF Emma to round out the group, Alexis feels like a third wheel. Then when Ava comes to visit Mia, Katie is the one who feels like she just lost her best friend. Eventually all the girls realize friends are like cupcakes--you can never have too many!

When fashionista Mia hears someone is starting a fashion club at school, how can she resist? After all, working in fashion someday is her dream. But can she manage being in two clubs at the same time, or is she spreading herself too thin? And will her Cupcake Club friends still be as sweet to her, or will Mia have to choose between cupcakes and fashion plates?

Hired with the Cupcake Club to serve a huge order at a neighbor's outdoor party, Alex, knowing that her crush will be in attendance, struggles to find just the right outfit when she discovers that she has reached an in-between size.

"When Mia reads about a Design-a-Dress contest in a magazine for "budding designers ages 12-16" she is excited. But she doesn't realize how much work designing--and sewing--a dress truly is until she starts on her contest entry. While Mia stresses out about all the work she has to do, she and Katie have an argument about, of all things, fashion preferences! Katie offers suggestions that don't really go with the outfit Mia has in mind. And when Mia...

Alexis makes a special valentine cupcake for her crush, Emma's brother Matt, and leaves it next to his computer, but when he starts acting strangely around her, Alexis rethinks her strategy.

In the midst of a terrible week, Mia receives a lucky charm from her cousins from Puerto Rico, and when her luck turns around, she attributes it to the charm, but when her bad luck returns, she must come to grips with the truth.

Alexis thinks she has the perfect project to win the Science Fairshes 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 Donays sweet sixteenand she is anything but sweet! Cupcakes with black icing, anyone?...