'The Voice': Blake Shelton Sings 'Gonna,' Smiles at Gwen Stefani [WATCH]

Standing atop a wooden set with a backing band filled with fiddles and guitars, Shelton himself strapped on his acoustic guitar and smiled the entire performance through. And, while he performed the song, which is about finding a new love and settling down, you can't help but notice that he flashes more than a few adoring looks toward his new girlfriend Gwen Stefani, who can be seen nodding along to the country track.

"Gonna" is the latest single from Shelton's 2014 album Bringing Back the Sunshine. And, Shelton wasn't the only established artist to take the stage on The Voice; Ellie Goulding was also on hand to perform "On My Mind."

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Blake Shelton, The Voice, The Voice season 9