While the ACM Awards on Wednesday night were certainly filled with powerful and even some tear-jerking performances, it's safe to say Blake Shelton and Gwen Stefani's romantic rendition of their song, "Happy Anywhere" was the most adorable. While the pair didn't perform live in Tennessee like many other acts, they made the best of their situation by appearing in front of a green screen that transported them to the Bluebird Cafe in Nashville. Shelton and Stefani, who have been together for more than five years, looked so in love as they sang their new duet in beautiful harmony. Though the couple released "Happy Anywhere" back in July, tonight marked their first time singing the upbeat track live. Ahead, watch their sweet performance, then get details on Gwen's outfit here.