Oggie Cooder Party Animal by Sarah Weeks.

Oggie Cooder has never set foot (or swim fin) in his neighbor Donnica Perfecto’s swimming pool. But now he has his chance – it’s Donnica’s birthday, and her mom has forced her to invite Oggie to the pool party! Donnica, though, isn’t about to let this happen. She has a plan to keep Oggie away. But what she doesn’t count on is the power of Oggie’s charving, an unexpected visit from a local rock band, a creative use of a cherry picker, a dog that tweets like a bird, and a boy in a bear suit whose identity will change everything when it’s revealed.