Problem Amethyst Kelly, Savan Kotecha, Amethyst Amelia Kelly, Iggy Azalea, Max Martin, Ariana Grande Piano, Flûte, Flûte à bec, Violon, Guitare, Hautbois Dance-pop, R&B contemporain, Folk, Pop, Rhythm & Blues Accords, Tablature, Transposition, MP3, MIDI
