The Idolmaster Cinderella Girls: Starlight Stage is a popular Japanese free-to-play collectible card and rhythm video game, co-developed by Cygames and published by Bandai Namco Entertainment. A spin-off of The Idolmaster Cinderella Girls, it launched for Android on September 3, 2015, and for iOS on September 10, 2015. Players act as a producer for pop idols from 346 Production, engaging in rhythmic gameplay by tapping buttons to song patterns, while also managing collectible idol cards with various statistics.

The game quickly achieved immense commercial success, reaching 4 million downloads by September 11, 2015, and grossing an impressive ¥26.6 billion in Japan by 2017. However, a significant announcement on July 2, 2025, confirmed that most new content updates, including new idols, songs, and events, will cease after October 1, 2025, following the game's 10th anniversary, with the Windows (DMM Games) service ending on August 21, 2025.