I don't think Sharon Osbourne or Amanda Holden are much to write home about. Sharon might have been a success but I suspect much was due to her father at the beginning and it's well documented that Ozzy treated her like tit in the early years. If the TV show hadn't come along they wouldn't be anything like as famous and we would have been saved Kelly Osbourne. Sharon comes across as a nasty piece of work.
Amanda on the other hand is bone-shakingly ambitious 'me' girl. If both of them never appeared on TV ever again I'd be pretty chuffed.