The performance began with Shelton in a suit standing by himself with guitar in hand with two rows of lights shining upward behind him.
After he sang the first verse and chorus, Stefani slowly emerged on the stage in a white dress covered in hearts walking toward Shelton, looking in his eyes while she sang and he joined in.
At one point, they grabbed each other’s hands while they continued to perform until they nearly wrapped things up.
The performance ended with Shelton bowing his hands toward Stefani while she pointed at him. As the audience cheered, they stood closely together, beaming.
Last November, the country crooner appeared at E!'s People Choice Awards and made no bones about how he feels about Stefani.
“I want to say, Gwen Stefani, I love the s-- out of you!” Shelton announced while accepting the award for best country artist.
"Happy b day to my favorite human!!! Can’t believe your mine," she wrote.