People who had every right to sing “Feeling Good”:

Nina Simone
Muse
Michael Buble
Adam Lambert

People who have absolutely no right to sing “Feeling Good”:

This Guy
&
David Hasselhoff (as evidenced by his performance on this week’s America’s Got Talent, in which he proves that he should be the last person judging anyone’s talent. On the bright side, it’s super-Hoffy!)