Since December 2014, former Apink member-turned-actress Son Naeun has reigned as the queen of the “leggings look.” Idol-turned-actress Son Naeun | @marcellasne_/Instagram For over a decade, Apink’s “LUV” practice video has received comments about how the idol and her Adidas brand leggings (which became known as and since remained “Son Naeun Leggings” in Korea) changed fashion forever.…