it is a little sad. Maybe it's jealousy as well... LOL. I know Elvis and Sinatra and others all had songwriters at least the artist had "star power" when they hit the stage.
When I watch Katy Perry in a live performance.... I don't see it. It looks like a soccer mom dressed in a weird outfit faking it for 3 minutes. Same with Rhianna and even Britney Spears...
Rhianna has some great singles but when she performs it's cheezy. She doesn't even try to entertain or lip sync half the time.