Question: Which Marina and the Diamonds song was released on December 7?
Sentence (from "How to Be a Heartbreaker"): Diamandis worked with Ammar Malik, Benny Blanco, Cirkut, Daniel Omelio, and Dr. Luke during the songwriting process, and enlisted Blanco, Cirkut, and Dr. Luke to oversee its production.
Relevant evidence: No