I'm indifferent on actors singing in musician biopics. Jamie Foxx in Ray did none of his own singing and it seemed distracting hearing Ray Charles's voice coming out of a different person, even though Foxx still gave an amazing performance anyway. Joaquin Phoenix in Walk the Line did all of his own singing and it seemed more natural, but on the other hand while he can sing, it didn't sound a lot like Johnny Cash to me. Again, still a great performance. I can live with either way as long as the actor gives it their all, and it looks like that's exactly what Malek is doing here.