The Pearl Sisters (펄 시스터즈) were two Korean women called Bae In Soon and Bae In Sook. Unlike a lot of 60's Korean 'happy happy' pop music they produced music with a beautifully moving melancholy edge. They also covered popular American pop tunes. Real stand out tracks include the wonderful 'Oh!' and the song 'I Love You' sung in charmingly mispronounced English. The Pearl Sisters are a great 'lost' act and although there is little information on the net about them it seems that they split in the mid 1970's. Read more on Last.fm