There's a new girl in town, and Mia tries to take her under her wing. But Olivia Allen is not so nice; as a matter of fact she might be even meaner than Sydney Whitman! She asks Mia to lend her money, and even though Mia has been saving for weeks for a new pair of shoes, Mia lends it to her, only to find out that Olivia has used the money to buy the exact same shoes Mia has been saving up for! Plus she makes fun of the other Cupcake girls and tells Mia she shouldn't be friends with them. Will she wreak havoc on the Cupcake Club before Mia sees her true colours?