BTS, also known as Bangtan Boys, are celebrating their fourth anniversary since the release of their debut single "No More Dream" on June 13, 2013. In a short period of time, the seven-member group has already proven their place in the global market. In fact, the K-pop act recently won the Top Social Artist award at the 2017 Billboard Music Awards in Las Vegas, making them the first Korean group to have received a recognition from the prestigious awarding ceremony.

BTS: A global music icon

Several billboards in Times Square displayed photos and videos of the popular K-pop group to celebrate their fourth anniversary on Tuesday.

These anniversary ads were reportedly initiated by Chinese members of BTS' official fan group, Army. Fans reportedly spent millions of dollars to run these campaigns in New York's entertainment center.

Aside from being branded as the "global K-pop icons" by Times Square, Vogue celebrated the boy group's fourth anniversary by looking back at how BTS changed the face of global fashion over the years. The fashion magazine specifically pointed out the members' looks at the 2017 Billboard Music Awards, where they complemented their black suits, not with bow ties, but with chokers and high-end accessories.

"Each artist found a subtle way to express his individuality, whether it was a slim leather choker or the unexpected flash of a silver boot," the magazine wrote.

Four years with BTS and ARMY

International fans of BTS had their own way of celebrating the boy group's fourth anniversary. Aside from the billboard ads in Times Square, ARMY members from Pakistan reportedly bought bus campaign ads on top of a pop-up store, while K-pop fans from the United Kingdom gathered for a night of fun and sharing.

ARMYs from Iran, Thailand, Pakistan, Chile, Brazil, Mexico, Japan, London, Japan and more also held a series of fan gatherings to look back at the achievements of their idols over the past four years. BTS, on the other hand, did not forget to treat their fans with "2017 BTS HOME PARTY," a V Live broadcast where the members entertained the ARMYs with their playfulness and surprise performances.

The seven idols were in their pink pajamas when they performed "Fire," "Boy In Luv," and "Dope." After heating up the stage, the BTS members sat down to reminisce their childhood days with throwback pictures. The K-pop group ended their anniversary show by thanking the ARMYs for their unending love and support.

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