well a while back around exodus era, maybe before. hikaru-chan mentioned 'sting'..its quite an honourable mention because it would be quite the scene to see those two sining together..highly doubtful, but an interesting thought. she should consider having a english duet for the finale in london..hikaru-chan and keane would be epic!!!

but from an honest approach..i think she should handle it herself...its 'her' tour..dueting i dont think will help..maybe a little, but nothing drastic..seeing hikki live is quite the honor so, no disrespect to IF she duets with someone, but id rather hear her voice pure than mixed with someone else.