What is the song played during Professor class in Harry Potter and Prisoner of Azkaban?

The song played during Professor Lupin's Defense Against the Dark Arts class in "Harry Potter and the Prisoner of Azkaban" is "Double Trouble" by the band "The Brian Setzer Orchestra."

This song plays during the scene where Lupin is teaching the students about boggarts, and the class is trying to imagine their worst fears. It's a very catchy and upbeat song, which contrasts nicely with the potentially terrifying nature of the lesson.