South Korean girl group Girls' Generation made a splash in the late 2000s and early 2010s as one of the world's most popular K-pop outfits, part of a new wave of acts that kicked off a global surge of interest in the genre. After the release of their 2009 breakthrough single "Gee," they made a swift ascent up charts around the world, racking up numerous number one singles in their native Korea and becoming a fixture on the U.S. World singles chart with million-selling dance-pop tracks including "The Boys," "Oh!," "Mr. Taxi," and "I Got a Boy." Korean-language albums such as 20...