Gwen Stefani teases Blake Shelton for 'stay safe' mishap during their 'ACM Presents: Our Country' performance

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Gwen Stefani can't help but playfully tease Blake Shelton.

The couple performed during the "ACM Presents: Our Country" special on Sunday night, singing their duet, "Nobody But You," by the fire at Shelton's home in Oklahoma.

However, at the end of the performance, Shelton, 43, told everyone: “Say stace, everybody, we love you." The country music crooner quickly acknowledged the blunder as Stefani burst into laughter and leaned onto his shoulder.

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Stefani, 50, couldn't help but share the hilarious moment on Instagram, captioning the clip:" #saysace Gx @blakeshelton."

It's clear quarantining at home together hasn't put a damper on the romance between the pair as their chemistry couldn't be denied during the performance.

"We happen to be in Oklahoma, hiding away from everybody, doing what we're supposed to do. And, we're also doing what I think everybody else must be doing, which is... drinking all day," Shelton joked.

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Along with singing in Sunday's special, the couple has been having fun during self-isolation, with Stefani recently giving her boyfriend a haircut, which caused quite the stir.

Gwen Stefani and Blake Shelton attend the 62nd Annual GRAMMY Awards at Staples Center on January 26, 2020 in Los Angeles, Calif. 

Gwen Stefani and Blake Shelton attend the 62nd Annual GRAMMY Awards at Staples Center on January 26, 2020 in Los Angeles, Calif.  (Steve Granitz/WireImage via Getty)

Stefani shaved stripes into the mullet that Shelton is growing out, which he claimed is a "symbol of hope" during the coronavirus pandemic.

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"Quarantine mullet update 3/26/2020..." he wrote on Twitter alongside a clip showing off his new hairstyle. "@gwenstefani has decided to take it to the next level.. Stripes."

Fox News' Jessica Napoli contributed to this report