How did K-pop become popular?

BTS: Who are they and how did they become so successful?, BBC, 11 Oct. 2018, www.bbc.co.uk/newsround/45721656.

How BTS became the world’s biggest boyband, The Guardian, 11 Oct. 2018, www.theguardian.com/music/2018/oct/11/how-bts-became-the-worlds-biggest-boyband.

How a boy band from South Korea became the biggest in the world, CNN IBM, 8 June 2019, www.cnn.com/2019/06/01/asia/bts-kpop-us-intl/index.html.