You made me laugh when you wrote "GaGa's of the world" when GaGa is just an attention-seeking ordinary copycat with absolutely no talent, whose "fame" has been fading away lately, as her albums sales weren't really impressive and her singles flopped. Rihanna on the other has had 11 number one hits in 6 years. Sooo hmm she doesn't need any vocal classes, because everybody buys her music . She needs no monsters :D