Do aging rockers need to pack it in?

Growing up, I remember being a little embarrassed at some of the young looking outfits my mother would wear. She dressed cooler than the other moms and looked much younger than the other moms and was much younger-minded than the other moms, but a good part of me just wished she was like everyone else. Of course, now that I'm an adult, I realize the freedom of being able to dress the way you want and be whoever you want to be is an important and awesome liberty I'm grateful both my mother and I have. (I'm not mad about having her good genes either.)

When I saw this this picture of The Cure's Robert Smith the other day, my first thought was, "Ugh, this guy really needs to put away the makeup and give up the act. He's too old!" My mind turned to another aging rocker back on the scene this year, Axl Rose from Guns N' Roses, whose career at this point in time seems futile. But look at this picture of Blondie's Debbie Harry taken one month ago. Sure, the outfit may be pushing it, but the woman has still got it! She looks great and loves performing, so who are we to tell her when to quit?

U2 remains one of the top touring bands in the world, and no one thinks they should stop. Rock legend Bruce Springsteen was requested to perform at the Super Bowl this year. But what about the Rolling Stones? Audiences are split on saying they're way too ancient to be singing about sex and drugs, but as classic rockers who not only lived but basically created that lifestyle, no one can stop the endlessly energetic Mick Jagger from jumping around on stage several decades later. As for Madonna, is her ever-changing trendy pop status growing weaker if she can still put out solid hits with contemporaries like Justin Timberlake?

Do you ever feel like certain rock stars have grown to old to keep doing what they're doing? If so, which ones? Do you think if they enjoy putting out music and performing they should keep going until they no longer can?