Multi-Grammy award winning and Rock and Roll Hall of Fame artist Madonna is now slowing down, even in her 50s. In 2008, tickets for her Sticky & Sweet Tour sold out within hours of hitting the box office.

Known as the "Nun on the Run," Sister Madonna Buder has finished about 40 marathons and 34 Ironman triathlons and two years ago, at the age of 75, she became the oldest woman to finish the Ironman World Championships.

For more than 40 years, rock photographer Bob Gruen has had an all-access pass to some of the greatest stars and moments in music history.

Now that you've put all your music on an iPod, it looks like an old friend is making a comeback. Vinyl record sales are on the rise. And it's not just oldies.