ACM Awards: Gwen Stefani Sings Along to Blake Shelton During "I Lived It" Performance

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Blake Shelton and Gwen Stefani

She was also one of the first people to stand and applaud Shelton following his performance.

Blake Shelton gave a nostalgic rendition of his latest single “I Lived It” at the 53rd annual ACM Awards on Sunday night. The staging was simple, with Shelton strumming on his acoustic guitar as a female violinist and two background singers accompanied him.

The singer’s vocals was tender and filled with emotion, but the best part of the performance came from a certain woman in the audience. Gwen Stefani, Shelton’s girlfriend and No. 1 fan, was spotted adorably singing along to the song’s chorus. She was also one of the first people to stand and applaud Shelton following his performance.

“I Lived It” appears on Shelton’s 11th album Texoma Shore, which was released in November.

Watch more of Shelton's performance, below.

This story first appeared on Billboard.com.