CrazyCall

They're billed as the world's biggest boy band but have you heard of them? The South Korean group BTS also known as the Bangtan Boys have sold out the O2 with some fans camping out for days. Chloe Keedy went to see what all the fuss is about. • Subscribe to ITV News on YouTube: http://bit.ly/2lOHmNj • Get breaking news and more stories at http://www.itv.com/news Follow ITV News on Facebook: https://www.facebook.com/itvnews/ Follow ITV News on Twitter: https://twitter.com/itvnews Follow ITV News on Instagram: https://www.instagram.com/itvnews/

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