Now they're both superstars in the music and movie industry with a career longevity rarely seen in Hollywood.

And it seems that a healthy lifestyle (Jennifer is tee-total) is not all the pair have in common, Like Madonna, J-Lo also approaches her work with relentless perfectionism.

"People are paying, and it has to be the best it can possibly be," she says of her 2012 blockbuster world tour. "You want people to have the best night of their life ... That’s your role, your responsibility as a performer.

"I’m driven in that way," she explains. "That’s what makes an artist. People in this business understand that, and everyone in the team pushes and pushes. They’re all artists. They want to be driven, everyone’s seeking perfection."

Jennifer Lopez's HBO documentary Dance Again goes behind the scenes on her world tour and is available on DVD and digital download. Watch the trailer here:

How this image of Madonna changed Jennifer Lopez's life