Blake Shelton turned out to the 2018 ACM Awards with girlfriend and pop star Gwen Stefani on his arm on Sunday evening (April 15,) and despite the fact that the pair didn't walk the red carpet, they could be seen smiling and enjoying the performances from their seats. The evening marked Stefani's first time attending an ACMs award ceremony, and she seemed to enjoy playing the fan and singing along during Shelton's performance of "I Lived It."

Shelton opted for a more clean-cut look while sitting in the audience, wearing a gray jacket and dressed-up jeans before swapping that look out to perform in a denim-on-denim ensemble. Stefani wore a form-fitting red dress that featured a deep neckline, as well as a nod to the genre of the evening with country-inspired fringes embellishing the back of the outfit.

In addition to performing his own single, Shelton also teamed up with Toby Keith at last night's ceremony for a rendition of Keith's debut 1993 hit, "Should've Been a Cowboy." The performance was one of three devoted to the "ACMs Flashbacks" series, which featured a legendary artist performing one of their throwback hits alongside a new country star, and served to pay homage to some of the most memorable moments in ACMs history and in country music.

Shelton and Stefani met, in the wake of their very public divorces, while serving as judges on the televised singing competition, The VoiceThe couple will celebrate their third anniversary in 2018. Shelton and Stefani weren't the only Voice judges to attend the Las Vegas ceremony: 2018 judge and pop star Kelly Clarkson also made an appearance onstage to perform another "ACMs Flashback," "Does He Love You," with ceremony host Reba McEntire.

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