Party☆People☆Princess is a maimai original song created by Sound Artz, marking the composer's first appearance in the maimai series. Sound Artz previously contributed the track "Vibes 2k20" to SEGA's ONGEKI, but Party☆People☆Princess represents their debut original composition for the maimai rhythm game. The song carries a bright, celebratory energy befitting its title, with a driving 152 BPM beat and a pop-EDM arrangement that evokes a festival or party atmosphere. Though the in-game artist credit lists only Sound Artz, the vocal performance was provided by Makibano Miruru (牧野野みるる), a VTuber who was active during the song's release and concluded her activities in March 2024. The music video was handled by 安倉 (Yasura), with character illustration by ちょん＊ (Chon*). The song debuted in maimai でらっくす BUDDiES on September 14, 2023, as part of the Party Area (パーリィちほー) Perfect Challenge event. Players initially needed to accumulate 700 km of total distance in the Party Area to challenge the song, with a Perfect Clear required to unlock it permanently. Starting with maimai でらっくす PRiSM (September 12, 2024), the song became available by default to all players. In the Chinese version (舞萌DX 2024), it was unlockable from December 4, 2024. The Expert chart was designed by サファ太 (Safata), while the Master chart was co-designed by 鳩ホルダー (Hato holder) and Luxizhel, a dual-designer collaboration that adds distinct character to the game's highest difficulty tier for this track.