"Mood Ring" is a song by American recording artist Britney Spears. It was included as a bonus track on the Japanese version of Spears’ 2016 album, "Glory". Spears later re-released the standard version of the album in 2020 with a new cover and included "Mood Ring" on this version, released on May 22, 2020. It is listed as "Mood Ring (By Demand)" on the tracklist.