http://online.wsj.com/article/SB10001424052702303640804577488681925950866.html?KEYWORDS=bieberHearing familiar, favorite music stimulates the release of dopamine, the neurotransmitter involved in pleasure and addiction, providing the same rush as eating chocolate or that winning does for a compulsive gambler, says neuroscientist Daniel Levitin, who was able to observe the process using fMRI scans in his lab at McGill University in Montreal.
Dr. Levitin's research also showed that musical tastes formed in the teen years become part of the brain's internal wiring, as that is the time when some neural pathways are solidifying and others are being pruned away. That's why the music adults tend to be nostalgic for is the music from their teenage years.
Boys also develop musical tastes in this phase of life, but adolescent girls are far more likely to become infatuated with pop stars, experts say, because they are awakening to romantic and sexual feelings that are both intoxicating and scary. Having a crush on a celebrity they are unlikely to meet is a way to try out such feelings at a safe distance. "A lot of girls I know practiced their first kiss on a poster. I don't think that's changed at all," says Mark Rubinfeld, professor and chair of sociology at Westminster College in Salt Lake City.