What's the POPIPA!?

 is a song by Poppin'Party.

It is the coupling track for their 13th single, Jumpin'. It was released on February 20, 2019.

It was written by Nakamura Kou, and arranged and composed by Kikuta Daisuke.

Video
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Trivia

 * Each members' solo parts in the first and second verses of the song include various references to their own, as well as other Poppin'Party songs:
 * Dokidoki SING OUT! (キボウ行きの電車で Sing out！)
 * Hanazono Denki Guitar!!! (Welcome！　飛べ！ハナゾノへ！)
 * Chocolate no Teion Recipe (いつかのポケットのチョコレイト)
 * Tooi Ongaku ~Heartbeat~ (みんなで分けあって Heart beat！)
 * Su-Suki Nanka Janai! (ちょままちょまままじ Lovin' you / ちょまままま　前へススメ！)
 * Teardrops (今日はなんかちょっと Teardrops)
 * Double Rainbow (二重[ふたえ]の虹架かる CiRCLING！)
 * CiRCLING (二重[ふたえ]の虹架かる CiRCLING！)
 * Kirakira datoka yume datoka ~Sing Girls~ (キラキラとか夢が Jumpin')
 * Jumpin' (キラキラとか夢が Jumpin')
 * Hashiri Hajimeta Bakari no Kimi ni (走り始めたら STAR BEAT！)
 * STAR BEAT! ~Hoshi no Kodou~ (走り始めたら STAR BEAT！)
 * Mae e Susume! (ちょまままま　前へススメ！)

Live Performances

 * February 23, 2019: Jumpin' Music♪ (short ver.)
 * October 8-9, 2020: Kirakira☆Festa Day! & Dokidoki♪Special Day! (short ver.)
 * September 24, 2022: Hoppin'☆Poppin'☆Dreamin'!!
 * February 4, 2023: GALAXY to GALAXY