Garth Brooks and Trisha Yearwood

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As far as anniversaries go, Garth Brooks and Trisha Yearwood must have to be "lovin' it."

Brooks, who came out of retirement and officially began his 5-year run of shows at Wynn Las Vegas on Saturday, had a fancy dinner planned to celebrate his 4th anniversary with Yearwood, but suddenly that meal became McDonald's French fries.

"That was our anniversary dinner," he told reporters Friday at Wynn Las Vegas, where - sporting jeans, sweatshirt and a baseball hat - Brooks played an acoustic set Saturday that included his influences (Bob Segar, James Taylor and George Strait) as well as his own songs, including "The River" and "Shameless."

Brooks, 47, said the dinner was supposed to include his kids, whom he says also "got married" to Yearwood in 2005.

"We had a big night planned and at the last minute they moved the youngest one's Christmas carol program to that night," Brooks said. "I promised them a big, fancy dinner, but we went and grabbed McDonald's fries and went home."