Conversation so far:
What happened with Koda Kumi in 2011?
On February 2, 2011, Koda Kumi's 49th single Pop Diva was released.
Was the single Pop Diva by Koda Kumi successful?
Commercially, Pop Diva experienced moderate success in Japan, reaching number four on the Oricon Singles Chart and number 11 on the Japan Hot 100, the latter published by Billboard.

Question: What is Dejavu?
Self-contained rewrite: What is Dejavu by Koda Kumi?