They were great together at the Grammys so if the two of them were to do a project together it would be awesome... but I don't know about them touring together.
I can't see Jennifer being the headliner of the tour but I can't see her opening for Xtina either. :-/
And I don't know if JH's style/voice would fit in well with any of Christina's work (Besides Back To Basics)
SO: I'm undecided about this idea
