'Pop2' artwork, courtesy Atlantic Records
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Charli XCX isn't quite done with 2017.

The singer on Friday released a new single "Out of My Head," featuring Tove Lo and ALMA. The song is a preview of Charli XCX's upcoming Pop2 mixtape, which is coming on Dec. 15.

The new project is XCX's second mixtape this year, following her Number 1 Angel, which was released back in March. Pop2 will feature MØ, Carly Rae Jepsen, Chairlift's Caroline Polachek, Pabllo Vittar, Jay Park and others.

Charli XCX recently wrapped a pair of tours supporting Halsey and Sia in the U.S. and Australia, respectively.

Hear "Out of My Head" below.