“100” is an unreleased song by English singer-songwriter Charli XCX. Very little is known about it besides the year it was recorded and its producers. It is speculated that the song was recorded during the Scrapped Third Studio Album sessions, commonly given the unofficial title of XCX World.

There is no relation with the 2017 song of the same name, as the latter was recorded in 2017 most likely intended for Pop 2 and ultimately scrapped.

The song leaked in full on January 15, 2021, along with several other songs.