In the tradition of "Pitch Perfect," two best friends battle it out for "a capella" group supremacy in this hilarious M!X novel.

Allison Gutknecht is the author of multiple books for young readers, including the Pet Pals series, Sing Like Nobody's Listening, Spring Break Mistake, The Bling Queen, and the Mandy Berr series. After graduating from the University of Pennsylvania, she earned her master's degree in children's media and literature from NYU. Allison grew up in Voorhees, New Jersey, and now lives in New York City.