in 2015, they found success in the american charts with their fourth extended play (ep), the most beautiful moment in life, pt. 2 entering the u.s billboard 200. the group is recognized as those who led the korean wave into the united states and have broken several sales records, becoming the first korean group to receive an award by the recording industry association of america for their single "mic drop". they are the first korean act to top the u.s billboard 200.