Teenagers are defined as people between the ages of 13-19. The lifestyles of teenage boys and girls differ in that boys today listen to rock, pop, and hip-hop music, work out, play sports and hang out working out or listening to music, while girls prefer different music genres, reading novels, watching TV dramas, hanging out at malls and beauty parlors. Teenage lifestyles have changed over time with boys and girls now having more activities to choose from compared to 10 years ago.