Blake Shelton surprised fans with a free pop up show in Fort Smith, Arkansas, on Thursday night (2/8),returning to the city where his Smithworks Vodka is bottled and finished. Aside from watching Blake perform during the show, lucky fans might’ve also caught a glimpse of his girlfriend Gwen Stefani as she stood side stage and sang along. Stefani even posted an Instagram live video as she sang the words to “I Lived It,” a heartfelt track from his latest album, “Texoma Shore.”

The video of Gwen singing along can be seen here:

But there was also a pretty frightening moment at the venue that night. According to KFSM-TV, a homeless man wielding a car antenna threatened concertgoers who were waiting in line for Blake’s show. Police soon arrested the man, who will now face a misdemeanor charge for disorderly conduct. Thankfully, nobody was injured during the incident.

Blake Shelton will be playing at the American Airlines Center on March 2nd with special guests Trace Adkins, Brett Eldredge, and Carly Pearce.