Sinead, PeeWee Herman...

 Mel Gibson? Robert Wagner? Kevin Spacey? James Woods? ... Pete Rose? Lance Armstrong?

(Who else might be considered entertainment "fallen" today?  Where they'll talk more about their controversial past, perhaps, than the art/entertainment that brung em? ... Caitlyn Jenner? Hm. I'm stumped.  Anne Heche would fit here, but she's already flown on to another world...)