Well, whether you like JLB's voice better than Freddie's or not, is one thing, but he does have a wider range than Freddie by about half an octave, and it does go very high, so note for note, he could cover those songs and still bring power to his performance without a problem. I mean, some Queen songs would be impossible to do justice to live, because of vocal layering and all that, but in a studio setting, I think it would work. I'm not saying JLB's performance would surpass what Freddie did, but it would still be enjoyable, and the songs would still sound great.