A-List Pop is home to the latest and greatest in the world of pop music. At the top of this week’s playlist is Lady Gaga with “Happy Mistake”, the focus track of her just-released new album Harlequin, a companion of sorts to the film Joker: Folie à Deux, in which she stars as Harley Quinn. Check back often, as our editors update this playlist regularly—and if you hear something you like, add it to your library