She was fun, funny and so charming. They loved having her on the show! The Voice twitter account is full of Pink gifs and quotes from her appearance, tonight. Best ones:
How good is that performance with John Legend! Don't Give Up was magic too. I need a collab for P7. Something in the vein of All Of Me or Like I'm Gonna Lose You.
"if i were pink i wouldn't like christina either for this" lol
this whole segment though... it's like pink said: "nice plug, you guys" they really tried their best to have people who are into catfights tune into NBC just to have them all be disappointed by actually nothing happening and pink and christina being normal to each other.