Watch: Keith Urban Invites Lauren Alaina Onstage for 'We Were Us' Duet

Keith Urban performed Monday night at the California Mid-State Fair in Paso Robles, and fans were in for a treat when the star brought out fellow country singer Lauren Alaina to duet on his hit "We Were Us."

Originally sung with Miranda Lambert, the song appeared on Urban's 2013 album Fuse. He told the crowd he knew Alaina could handle the track because he'd heard her perform it before, and he was definitely right!

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The 22-year-old, who is known for her powerhouse vocals, brought major energy to the track, as well as some pretty great dance moves.

Urban played guitar on the track while Alaina got the crowd moving, with the duo uniting for some fist pumps during the middle of the song.

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Urban later shared video of the performance to social media, telling the singer, "Hey Lauren Alaina - I got an open mic for u anytime."

Alaina also posted about the moment on Instagram, writing, "Thanks @keithurban it was an honor! You're the best."

Photo Credit: Facebook / Keith Urban