
Rock’n'Roll also invented the teenager as a consumer and so called youth culture. Suddenly there was a different music and stars for youngsters.
After the dreadful WWII the new middle class could afford to give some money for teenagers, who were eager to spend their allowance. The teenager therefore is a product of modern rich society – a luxury item of you will …
While kids can be pleased with toys, teenagers are eager to define themselves with style and suitable products. So music became the a tool for identification (or better say product?). Depending on your teenage tribe (and personal "style") you listened to a specific kind of music. Subcultures proved to be goldmines. Anyone who could define a new "style" or own certain artists could literally print money …

The first King of Global Record sales and Teenage Manias.
Plus mass production allowed cheap records, radios, record players and TVs. Most of all the new medium television needed to be feed constantly with new acts, personalities and stories.
Stars and celebrities were nothing new at that time. Already the Roman Coliseum knew the celebrities and famous athletes. But it was in the roaring 1920’s when the true Star Cult was born – mostly thanks to Hollywood. Charlie Chaplin and Mary Pickford were the first global stars. But apart from movies in the theatres, cigarette and chocolate cards there was little to consume for the masses.
The real celebrity based merchandising frenzy and consumerism started with the 1950’s and the invention of the teenager …