Beyonce is beautiful and she loves to work so we should let her have her peace of mind. She is an artist. Artists try to take breaks but they can't because they have a constant need to express themselves.

As for Kelly...
She's really big and she is shining. She's not as big as Beyonce but she's still raking in cash and making people dance. She has a huge cult following. She's huge in the UK (the USA is not the only place you can make it, you know).

There's nothing wrong with not being a superstar. You can still make a good living and you can still make a lot of people happy. You don't have to be as big as Beyonce to do that. There are thousands of musicians that never reach superstar status that have wonderful, fulfilled lives. Also, musicians enter the business knowing they may never make any money but they do it anyway. Music is a reward all it's own.