They're both recognized for being the voices our generation, they're both born with full 4 octave range, they both have the reputation of being amazing performers but who would win in a vocal battle?
Comparaisons:
Christina María Aguilera
33 years old
15 years old career
+50 millions albums sold
Beyoncé Giselle Knowles-Carter
32 years old
16 years old career
133 millions records sold (inculding her involvement in Destiny's Child)
I'd say Xtina has a more powerful voice but Beyoncé has a better control of hers.
I admire both though. And they s**t on everyone else in the game (except Adele maybe).
Beyonce, her technique is miles ahead of any other singer in the game so she actually knows when to make her voice powerful and when not to, not too sure about the other option