Aaliyah's second album doesn't necessarily prove that she is indeed One in a Million, but it does showcase more depth and talent than her acclaimed debut.
That's not only due to the greater variety of material on One in a Million, or to the way that her producers (Vincent Herbert, Jermaine Dupri, and many others) immaculately produce each track, but it is also due to the fact that Aaliyah's singing is smoother, more seductive, and stronger than before.
It might not be the commercial juggernaut of Age Ain't Nothin' but a Number, but One in a Million is a more consistently satisfying album.