"Pop Diva" (stylized as "POP DIVA") is a song recorded by Japanese musician Kumi Koda, taken as the fourth and final single from her ninth studio album Dejavu (2011). It premiered on December 14, 2005 by Rhythm Zone and Avex Music Creative Inc. in two physical formats and for digital consumption. The song was written, composed, arranged and produced by musical artist Lil' Showy, making it one of few tracks from Dejavu to not be written by Koda.

Musically, "Pop Diva" is an uptempo dance-pop tune that heavily incorporates the electronic genre and hip-hop, and is one of few tracks from the parent album to bare this sound. The lyrical content describes Koda's personality as somewhat of a diva, and also delves into the themes of fame, success and beauty. Upon its release, "Pop Diva" received positive reviews from music critics, who commended the sound, catchiness and deliveries. However, minor criticism was aimed towards the songwriting.

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. Despite this, the single was certified gold by the Recording Industry Association of Japan (RIAJ) for digital purchases of 100,000 units. An accompanying music video was directed by Ryuji Seki, which depicted the singer in a futuristic city and laboratory. In order to promote the single, Koda featured in one commercial in Japan and was included on two concert tours.

"Pop Diva" was written, composed, and produced by Japanese artist Lil' Showy. "Pop Diva" was the only song from her Dejavu album not to have included Koda in the writing or composing process; the last time she did not contribute to writing, composing, or producing any songs were from her eighth studio album, Universe (2010). It was selected as the third and final single from Dejavu and was released in Japan on 2 February 2011 by Rhythm Zone, a sub-label from Avex Trax. The Maxi CD version of the single contains the B-side "Black Candy", and includes the two songs instrumental versions. A bonus DVD includes the music video and making video of "Pop Diva".

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