K-pop band BTS has made YouTube history for its "DNA" music video, which has been viewed more than 550 million times. The septet is the only Korean group to surpass the 550 million marker on the platform. InsideEdition.com spoke to Cara Stevens, author of the unofficial BTS fan guide, earlier this year. "ARMY and BTS fans are an absolutely amazing force to be reckoned with," Stevens said. InsideEdition.com's Leigh Scheps (http://twitter.com/LeighTVReporter) has more.