Crossing Over

I saw a comercial for American Idol last night and  I was thinking, alot of musicians are crossing over into the world of television. Steven Tyler is a judge on American Idol, Gene Simmons made Gene Simmons Family Jewels, Lady Gaga says she would love to be in movies, and a lot of singers have cameos in movies all the time.  Sometimes actors cross over into the world of music too. Do you think people should stay where they are or is it good to have actors that play music? Sometimes people do well when they cross over but alot of people don't, Ozzy Ozborn for example. He made a show about his family and it was canceled after not very long. I think that sometimes older singers used to be really famous but they arn't anymore and they try to hold onto their fame for as long as they can, but it doesn't always look good. Some people like Ozzy will be remembered for their music but also for his bad show at the end. Do you think people should quite while they are still good so people will remember them that way, or should they keep going until they finally have to quite even though they wern't as good at the end?