I never bag anyone.... but....

Yep, bad singing here, no doubt. BAD.

That said, this was obviously the intro to his set. He wanted something playing that everyone there would know and be singing along to when he came out. Good idea from that point of view. Also, he obviously knew that he coulnd't sing it, so he tried to hit a couple lines to keep the crowd going and let the track/crowd handle the majority of it. He had enough sense to not keep it going either. Just a taste of a verse and boom, into his set. The people in the audience were probably singing along too loud to even realize how bad Kanye sounded. I imagine that those 135,000 people that bought tickets weren't pissed about the 5 lines of Queen that Kanye sang (horribly).

And just to further soil my reputation and hammer home the point that I obviously have no taste, I like Kanye's music.