He isn't very good. I must not hear what you hear in him.
I still hate when they do "themes" for these shows. Songs of the Diva's isn't fair to any of the guys or the rap group. Let them sing the type of music they want to sing as artists. When they win the show they aren't going to sing "songs from the 70s" or "country western night" or any other random gimmick theme they throw on the contestants.