In reply to Clarksoooooooon.

Xtina has too many a technical flaw to be the greatest singer. Inconsistent vibrato, belting riddled with tension as a result of the poor underlying technique. Leading her to crack often in her upper register. She forces her "big" sound often giving a Kermit like quality to her belting.

Her tone when she stays within her comfort zone is lovely and I like her choices of ornamentation. But those positives are subjective. Not factual. Her technical shortcomings are objective so she cannot be the greatest.

Beyonce, Le'Andria Johnson and Keke Wyatt are the best vocalists of their generation.