shake it! is a VOCALOID dance track by producer emon, featuring Hatsune Miku, Kagamine Rin, and Kagamine Len on vocals. The song originally appeared on emon's 2012 album emoloid4 before being added to maimai as part of the ORANGE version on November 13, 2014. Built around a steady 130 BPM pulse, the track blends funky synth lines with an upbeat, celebratory mood, lyrics invite the listener through a secret door into a night of dancing, shooting stars, and time-space travel (四次元への旅). In maimai, shake it! debuted under the "niconico" genre label; from the PiNK version onward it was recategorized as "niconico & VOCALOID" to better reflect its vocal synthesis roots. The EXPERT chart was designed by はっぴー, while the MASTER chart (level 12, difficulty constant 12.5) was designed by Techno Kitchen and features dense slide-note patterns typical of that designer's style. The song's level has been adjusted several times across maimai versions, the Master chart, for instance, began at level 10 in ORANGE and was incrementally raised to 12 by the UNiVERSE PLUS era. Outside of maimai, shake it! also appears in SEGA's ONGEKI rhythm game, performed by Himawari (向日葵) in place of the VOCALOID vocals.