Pop 2 is the fourth mixtape by English singer Charli XCX, released on 15 December 2017 by Asylum Records. Executively produced by A. G. Cook of PC Music, sessions for the mixtape began several months before its release and featured a wide variety of guest contributions. The mixtape was backed by its only single "Out of My Head" featuring Alma and Tove Lo, released exactly one week before its release.

Pop 2 was acclaimed by critics upon its release; some reviewers went on to call it her best body of work yet. Its innovative blend of electronic music influences was generally praised by reviewers. In 2019, Pitchfork ranked the album 40th in its list of "The 200 Best Albums of the 2010s".