There are at least 3 artists under this moniker:

1. Piki Shibakura

Creating Original/Remix Progressive Trance/Uplifting Trance/Euphoric Trance/Progressive House/Happy Hardcore

https://soundcloud.com/piki_shibakura

2. Macedonian rapper, member of the hip-hop group Dope kukjata

3. PiKi, the Japanese idol unit consisting of Karen Matsumoto (松本かれん) from FRUITS ZIPPER and Haruka Sakuraba (桜庭遥花) from CUTIE STREET who are under ASOBISYSTEM's idol project "KAWAII LAB." with both members having the image color pink in their respective groups. Read more on Last.fm. User-contributed text is available under the Creative Commons By-SA License; additional terms may apply.