Garth Brooks was called out by President Jimmy Carter during a recent humanitarian trip he took with his wife, Trisha Yearwood. The "Ask Me How I Know" singer told talk show host Ellen DeGeneres about his work and experience with Carter during Friday (Nov. 1)'s episode.

The country singer and 95-year-old former president were building houses for Habitat for Humanity in Haiti when the former president pulled Brooks aside. "He's a very hard worker," Brooks tells DeGeneres, "He has no limit on his work ethic, and there's nothing you can do to stop him from working you."

Brooks had taken a short break, and Carter caught him in the act of resting.

"We're in Haiti working on the roof [of a house] all day long and they're metal roofs and it's 115 degrees. When you get a roof on, the great thing is that now the house has a roof — you can go down and stand underneath it and get two seconds of shade," Brooks explains.

"My two seconds of shade the president walked in and I'm sitting there and he goes, 'Do you need something to do, Garth?'" he continues, laughing as he recalls the moment.

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His response to the president's remark was to hop straight back into finishing more houses.

"I said, 'No sir!' and I jumped right back out there," Brooks admits. "You're not going to outwork him or Miss. Rosalynn [Carter], they just keep going."

You really can't outwork the Carters. The former president recently fell at his home, which resulted in a wound over his eye, and just hours after receiving treatment he was back volunteering and building houses in Nashville.

"He fell that morning in Georgia — fourteen stitches over his eye — and he was building [houses] later that day in Nashville," Brooks says. "That's just the kind of people they are."

After the interview, the country star performed his classic hit "Callin’ Baton Rouge."

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