In terms of chords and melody, Popstars is more complex than the typical song, having above average scores in Chord Complexity, Chord-Melody Tension, Chord Progression Novelty and Chord-Bass Melody.
Popstars has sections analyzed in the following keys: E♭ Mixolydian, F♯ Major, and E♭ Major. Click on the linked cheat sheets for popular chords, chord progressions, downloadable midi files and more!