Hours before Marian Hill‘s SnowGlobe Festival set on Friday (Dec. 30), the duo teased that a “very special guest” would be joining them in South Lake Tahoe, Calif. That night, Fifth Harmony‘s Lauren Jauregui, who collaborated with Marian Hill on new track “Back to Me,” appeared on stage for their first public live performance together.

“It’s so cool to sing your own words and watch people in the crowd f— with it..truly the most incredible experience #thankyou,” Jauregui tweeted after the show, on Saturday (Dec. 31).

“SLAYED it so proud to be the first of many,” Marian Hill wrote back.

Watch a fan-captured clip of their performance below.

The SnowGlobe lineup, taking place from Dec. 29-31, also featured artists including the Chainsmokers, Major Lazer, Flume, Lil Yachty, D.R.A.M. and more.