Demi Lovato Unveils Racing 'Let It Go' From 'Frozen' Soundtrack: Listen

Demi Lovato performs onstage during the Teen Choice Awards 2013 at Gibson Amphitheatre on August 11, 2013 in Universal City, California.

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Demi Lovato is in the midst of promoting "Neon Lights," the latest single from her "Demi" album, but the pop singer has taken a quick detour for the benefit of a Disney soundtrack. Lovato's version of "Let It Go," from the upcoming film "Frozen," was released online on Monday (Oct. 21).

"Let It Go," which will be performed in "Frozen" by voice actress/Broadway vet Idina Menzel, gets a pop-rock makeover befitting of Lovato's oeuvre, with guitar flourishes, orchestral punches and lyrics about triumphantly moving on. "Up here in the cold thin air, I finally can breathe/I know I left a life behind, but I'm too relieved to grieve," Lovato sings on the track.

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The "Frozen" soundtrack hits stores on Nov. 25, right before the animated film is released on Nov. 27. Earlier this year, Lovato contributed the track "Heart By Heart" to the soundtrack for "The Mortal Instruments: City of Bones."

The "X Factor" judge is also preparing to kick off her Neon Lights tour next February, with Fifth Harmony, Cher Lloyd and Little Mix as support.