At the beginning of the 21st century, in most of the world, the average age is only 25; there are going to be more teens in the next ten years than in the last 25. Attaining global leadership requires an organization to appeal to the teen market. Based on the results of a worldwide study of teen consumerism, which surveyed more than 27,000 teenagers in 44 countries, this work aims to help marketing and advertising professionals target teens by better understanding their similarities and differences. The results of the survey reveal teen attitudes, values and views towards brand affinity in a wide range of product categories - fashion, electronics and technology, entertainment, media, food and beverages, and more - and provide all the information marketing managers need at a fraction of the cost of obtaining the primary data.