Siblings Lee Chanhyuk and Lee Suhyun's winsome harmonies make their catchy folk-pop tunes soar. The duo won the second season of SBS's K-pop Star in 2012, where their playful original songs (like “Don't Cross Your Legs” and “Is That Ramyeon”) and precocious talent caught the judges' attention. Their songs tend toward the sunnier side of the pop spectrum; even a sad tune like “Time and Fallen Leaves” has a lightness to it, thanks to Chanhyuk's delicate musical arrangement and Suhyun's gorgeous falsetto.