I was thinking while checking Kanye West's blog (his posts vary a lot). I really think him and Hikki could collaborate and make some epic song. I know their are people who don't like him but you got to admit he is a great producer and sales like crazy. He would certainly be Hikki's ticket to fame in the US.
For one, he has shown influence and interest in Japanese culture (his Stronger video, Good Morning video, album design for Graduation, etc.). Second he does make music very different from the mainstream like Utada in Japan. Third he always likes to work with whats new and fresh, and Utada being asian might attract him lol.
A collaboration would be possible if maybe we could somehow spread the word on Hikki to him in his blog, maybe telling him to check her new album and Japanese discography.