"BAD BLOOD" is a song performed by Puzzle Team members Kei, Yeeun, Nana, Suyun, Sangah and Wooyeon. It was performed for the dance battle of the fourth round of Queendom Puzzle. It was released as the first track of the show's second digital compilation album "Queendom Puzzle All-Rounder Battle 2" on July 19, 2023.