(Clockwise from top left) BTS, BLACKPINK, TWICE, IU, Park Seo-joon, Lee Min-ho, Cha Eun-woo, Hyun Bin, Son Ye-jin, Kim Seon-ho and Kim Soo-hyun (Instagram, YG Entertainment)  Forbes Korea magazine revealed its 2021 Korea Power Celebrity 40 list of the most influential people in South Korea...