Shake It Up is Japanese, R&B-turned-pop singer-songwriter Kumi Koda‘s fourth single in her 12 Single Collection. It hit No. 6 on the Oricon Singles Charts and remained on the charts for five consecutive weeks. Like the other singles in the collection, “Shake It Up” was limited to 50,000 copies.
Each single in the 12 Singles Collection had unique cover art based on certain cultures in various countries. The back cover of each single was a piece to a puzzle, which could only be completed by purchasing all twelve singles. The same was done for the obi strips, which contained a full image when arranged together in order. However, the obi strip image was omitted on the Hong Kong versions.
“Shake It Up” was used as the ending theme of Nippon TV‘s informational program The Sunday (THE・サンデー) through the month of December 2005. The show was broadcast live every Sunday from October 1, 1989, until September 28, 2008 [in March 2011, it was renewed as The Sunday Next (TheサンデーNEXT)].
The song contained mainly elements of pop with the music video showing a darker theme of a puppet brought to life and controlled by two puppet masters. Despite the gothic theme, the song itself was about losing yourself to music. “Shake It Up” was composed by musical composer and lyricist Kim Hiroshi. Hiroshi had previously composed the music for Kumi’s song “life” from her Kiseki single and had also worked with fellow label-mate BoA.
“Shake It Up” was not part of a story line and carried a dark gothic theme.
In the video, Kumi is dressed in lolita fashion, and shown to be a mannequin in a tailor’s room. When the clock strikes a certain hour, her mannequin form comes to life. Throughout the video, it shows the mannequin being controlled by two puppet masters, who have her dance for their amusement. Another incarnation of Kumi, who dons a pink dress, watches the clock that brought the mannequin to life. When the clock strikes again, the mannequin returns to its normal life and position in the tailor’s room as the Kumi in the pink dress leaves the clock.
Despite the music video’s dark theme, the song itself was more optimistic. The song’s lyrics are about letting go of life’s worries and living for the sound of music.