I don't know about you guys, but I would seriously laugh out loud of any of today's artists tried making a political statement. I mean can you see J. Lo on stage shouting "WE DON'T WANT WAR!" and actually take her seriously? What about 95% of all the 'hip-hop' artists? Can Nelly even say Iraq without it sounding like "Irk"??
Music is a commodity these days, and most commercial artists (esp. those represented at the Grammy's) have already sould their souls to their Corporate Creators. The rest of them are about as mindless as the people who buy their stuff on a monthly basis. The last great political movement in music was probably the punk movement of the early Eighties. A few good bands came along after that with political undertones in their music (btw, where the hell is Zack de la Rocha?) but there wasn't really any 'movement' or undercurrent. I guess latin musicians had a thing going in the Nineties, but it wasn't much.
Bottomline, today's musicians have no place in politics and I doubt if they can even make a difference. Even Bono and the Beastie Boys seem to be fighting a lost cause or something..