Yeah it was, his voice is quite distinctive and once he let go and just sang, it was hard not to know it is him under that mask. I think it was easier though for us Idol fans, because we listen to him so often, but with the celebs being under that mask, and it can literally be "anyone" not just singers (actors, talk show hosts, athletes etc), it is harder to pinpoint who it is
Here's the
Fox's reveal xD