BTS beat Taylor Swift, Bruno Mars, Bad Bunny and Lady Gaga in the artist category, [Getty Images] South Korean seven-piece BTS have won Artist of the Year at the American Music Awards (AMAs) for the second consecutive year, cementing their status as one of the world's biggest bands. The award, considered the ceremony's grand prize, is just the latest crown jewel for the so-called kings of K-pop, who have been on a $1bn world tour since returning from a nearly four-year hiatus in March.