The huge popularity of Seo Taiji & Boys among teenagers shifted the focus of the Korean music industry to teen-centred pop music. Idol bands of young boys or girls were formed to cater to a growing teenage audience. H.O.T. was one of the first idol boybands, debuting in 1996 after rigorous training encompassing not only singing and dancing skills but also etiquette, attitude, language and the ability to deal with the media. The song "Candy" sung by H.O.T. presented a softer and gentler form of pop music with upbeat and cheerful melodies accompanied by energetic dance steps – a formula adopted by many subsequent idol groups. The group was a huge success and the fans copied the group's hairstyle and fashion. Merchandise affiliated with the group ranging from candy to perfume were sold as well. Their success was followed by that of young boys and girls idol groups like Sechs Kies, S.E.S., Fin.K.L, NRG, Baby Vox, Diva, Shinhwa and g.o.d, which also became popular among the younger generation.