Rinrin and Ranran

Rinrin & Ranran (Japanese:リンリン・ランラン, also romanized as Lingling & Langlang or Linlin & Lanlan; known in Hong Kong as the Lokka Sisters, Chinese:樂家姊妹; b. January 3, 1959), were a musical duo in Japan and Hong Kong that were famous in 1970s Japan.

The duo was born as Letilia and Katherine Barber and were twins. They debuted in Japan in April 1974 with the single "Koi no Indian Ningyou" (Indian Doll of Love). The single peaked at #27 on the Oricon chart list and sold over 84,000 copies. They produced 7 singles and 3 albums. Their last single in Japan was issued in 1976.