The Kylie and Madonna thing is pathetic, they are two completely different female singers who happened to launch at a similar time and with similar styles, since then they have both branched out to be quite different.
Madonna and Kylie are both beautiful, talented, successful women with large fanbases and a whole host of massive hits and albums.
I doubt Kylie cries herself to sleep each night over Madonna being more popular worldwide. Kylie is a legend. Just as Madonna is.
About the America thing, I truly do not believe Kylie cares, if Jay-Z offers you a record deal when you're current label keeps messing you around of course you say yes!
The fact he's based in America is irrelevant!
The Voice will do her good because unlike Jessie the chav, Kylie is a nice, caring woman who knows what she's talking about.
Anyways, good luck to Kylie on her new album and ventures, I think it's fantastic to see her striving forward at her (still relatively) young age, and congratulations to her for all her achievements. By the looks of things Kylie is the one artist so far other than Britney who has survived the power of and never ending cycle of brilliance that is Madonna.