Humanity has been deemed antagonistic, toxic, and vaguely sentient by the other aliens of the multiverse, and must prove their right to exist by competing in a singing competition. If they don't make the top 10, they'll be obliterated. Competing on behalf of humanity is a washed-up glam-rock band.
This book was endlessly funny and full of heart. It celebrates all of life's diversity, awkwardness, hopes, fears, little joys, and big regrets. There are some really moving passages about feeling endangered - being queer, being an immigrant, being a nerd, being contrary to someone else's expectations in general - that had me tearing up.
However, big however for non-Sci-Fi fans, A LOT of the moralizing comes after a random anecdote about a made up alien's version of normal. If you don't like Dr. Seussian levels of nonsense, this is not the book for you. If you like Hitchhiker's Guide and Rick & Morty, pick up this book!!!