After dropping their acclaimed single "Gee" in 2009, Girls' Generation were catapulted into massive international success with anthemic lyrics and heart-thumping, beat-driven numbers. "The Boys" was the ultimate party-starter, capable of gathering everyone to the dance floor, while darker more contemplative tracks like "Time Machine" showed a mature side to the girl group. The girls continue to reign high in the ranks of K-pop; their latest works encompass EDM-inspired elements yet still embody that limitless "GG" energy.