She claiming artistic license. Oh well then, don't expect universal acceptance. As a matter of fact, plan for outrage and confusion, because that's often what artistic license gets you.
that being said, anyone who doesn't get the part where she was paid to sing a particular song with an expected set of lyrics -- and that her not doing so would justifiably piss people off -- and trying to make some sort of race issue out of that -- well, bullshit.
BUT -- I fail to see what the hell this has to do with Obama. I also don't get why this is such a huge deal. Don't book her again to sing something specific; obviously she sings what she feels like singing. It's not like it was a World Series game, fer cripes sake. No one would have known about it if the press didn't see some stupid "significance" in this that really isn't there. The Denver City Council?? Why should I care again?
So, the interest of the press and the blowhard outrage out there seems suspicious to me, along the lines of "look what we are going to get if we let 'them' get out of hand." If Obama wasn't the presumptive nominee, would anyone give a damn about this story? Would it have lived more than 24 hours?