Book excerpt: Clare and Mary do everything together. After all, they're best best friends. But on Mary's birthday, she gets a party, a shiny crown, and lots of attention--and Clare gets jealous. The best best friends get into a big, big fight. Only after Clare comes up with a way to make peace do the girls realize that between true friends, love triumphs over jealousy every time (even when it comes to crowns and cupcakes).