Christina. I'm not here for Beyoncé's ballads at all, although I use Halo and 1+1. But on average Christina's ballads are much better. I'll go listen to The Voice Within now
Christina's Oh Mother slays me, I have to admit.
I'm flicking through her ballads now. Some are really great but have such horrible points where she does too much.
Beyonce isn't really known for her ballads; they aren't even her biggest hits. I personally prefer Beyonce's ballads, I guess Christina would be more of a "queen" in that area. But I'd go for Beyonce since her ballads are more pleasurable to me.