Bob Dylan

Bob Dylan (Getty Images / October 30, 2012)

They are three of the biggest living icons in popular music. Make that aging icons. Still, their images are indelible, their music timeless and their popularity remarkably undying. In fact, when it comes to ticket sales, these geezers are as hot as Justin Bieber.

Madonna, Bruce Springsteen and Bob Dylan all are on tour and are filling arenas and concert halls across America.

The Blonde, 54, is on target to have one of the top 10 tours of all time. The Boss, 63, has not only the biggest tour of 2012 but also the biggest of his career. And the Bard, 71, is having a storied year with a Presidential Medal of Freedom and one of his most universally acclaimed albums since the mid-1970s.

Other than being members of the Rock and Roll Hall of Fame, what do these giants of popular culture have in common? Several qualities, actually:

They're visionaries. When they started recording, they emulated their influences — Woody Guthrie (Dylan), the Supremes (Madonna) and, for Springsteen, Dylan — but each developed a distinctive vision. The Bard became the reluctant spokesman for his generation, an agitator in words and music, a self-styled enigma on many fronts. The Boss became a working-class hero who put on epic concerts and rallied behind underdogs of various stripes. The Blonde became a fiercely independent, media-manipulating, outspoken button-pusher who kept dance floors jumping and fashionistas drooling.

Even though their visions are disparate, "they take live performance really seriously," said Rolling Stone contributing editor Anthony DeCurtis, who has taught courses on Dylan and Springsteen at the University of Pennsylvania. "They go out there with a sense of purpose, a sense of fun and a sense that you're all there to have an experience."

They have drive and a work ethic. Dylan tried to escape small-town isolation. Springsteen never got along with his dad. Madonna lost her mom at a young age. Is that what drives these superstars? Dime-store therapists might say so.

But no one seems to question the Midwestern work ethic of Dylan (from Minnesota) and Madonna (from Michigan) or the blue-collar pedigree of Springsteen (from New Jersey).

"No one works harder than Madonna," said George Travis, Springsteen's longtime tour director who also helmed a tour with the Blonde One. She puts in countless hours of brainstorming, creating and rehearsing, not to mention time in the gym to maintain that buff body.

The Boss could rival Madge for physical condition. In the 1970s, he became legendary for marathon concerts that often stretched beyond three hours. Now, 31/2 hours has become the norm.

But who can rival Dylan, the ultimate road warrior? Since he began his Never Ending Tour in 1988, Dylan has played more than 2,500 concerts, averaging about 100 a year.

"He plays a lot of secondary markets that don't normally get A-list or iconic artists," said Gary Bongiovanni, editor of the concert journal Pollstar. "Clearly at his age, he doesn't need to do it."

At the South by Southwest Music Conference this year, Springsteen told young performers that "you have to bring it every night." That's a trait all three superstars share, said Los Angeles broadcast consultant Jeff Pollack. "They have a real commitment to their audience. They do what is old-fashioned and new at the same time: Give the fans something special."

They stay in shape. Dylan puts on gloves and boxes. The Boss doesn't eat or drink anything not approved by his trainer/ nutritionist. And both he and Madonna work out like they're training for the Olympics.

"The physicality of it is important," DeCurtis said. "The healthier they are, the better they preserve themselves, the better they look, the better your experience is. There's a big aspirational element to all of this. You want to look up to all three of them."

Indeed, we want our heroes to be forever young.

They're bold. Their moves made headlines that became chapters in the history of rock 'n' roll.

Folk hero Dylan goes electric at the Newport Folk Festival.

Rock god Springsteen goes folkie with "Nebraska."

Madonna goes anti-Catholic in her "Like a Prayer" and "Papa Don't Preach" videos.