The iPod economy is worth millions, according to new research from the Envisioneering Group.
The firm's research director Richard Doherty believes what's unusual about that economy is the "emotional attachment" people feel toward their music players, according to The Times-Picayne.
According to the Envisioneering Group's research, iPod owners typically spend half the price of an iPod on accessories.
"We become more emotionally attached to our music than to TV shows and movies," Doherty said. "It's no longer just a music player - it's a friend, it's a dance partner and it's a jogging partner."