Lauren Jauregui made a surprise post-holiday pit stop at SnowGlobe Festival in South Lake Tahoe, California on Friday, December 30.

The Fifth Harmony star was on hand to sing her duet with Marian Hill, "Back to Me," the single she collaborated on with the electro-pop duo back in early December.

Marian Hill teased their special guest on Twitter a few hours before going onstage last night, where Jauregui eventually joined them for a live rendition of the moody alt-pop track.

Afterwards, Jauregui gushed about how "cool" it is "to sing your own words and watch people in the crowd f--- with it" on Twitter, and called her joint solo performance "the most incredible experience."

Watch clips of the performance, below:

Check Out Fifth Harmony's Best Live Vocals:

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