I don't want to sound rude, but here's my opinion: I really don't know why she ever "should" say something about Jackson's death...
If she isn't a fan on him or a listener, I don't see the point... Or she should also make a tribute to Farah Fawcett! Maybe she respect him (surely) but come on she really doesn't have to do it or even to think about it.
Personally I would even find it a bit akward if she does it "in public".
Yet I don't want to start an argument or a debate (too late?
).