Mariah definitely had power in her earlier years.
She has vocal nodes and being that she learned to sing around them, it was inevitable that her voice deteriorated over time.
Her Grammy performance of If It's Over is pure power belting and a broad display of range.
And also with nodules, if you're singing those vocally taxing songs over and over again, your voice weakens.
That's one of the main reasons she didn't tour often.
