To learn Aaliyah - One In A Million chords, grasp the musical fabric of the song with this sequence - B, C#m, B, C#m, Bm, F#m and Bm of chords. Begin your practice at a relaxed 30 BPM, then work your way up to the song's BPM of 61. Configure the capo to your vocal range and chord preference, remembering the key of A Major.