Country music artist Lee Greenwood appeared on "Fox & Friends" Monday to share his memories of George H.W. Bush, who he called "the most generous patriot."

The nation will begin saying goodbye to the 41st president of the United States on Monday when his body arrives in Washington and will lie in state at the Capitol Rotunda.

Greenwood -- best known for his patriotic anthem "God Bless the USA" -- traveled with Bush and performed at campaign events in the lead-up to the 1988 presidential election.

"It was such a warm and genuine relationship that I had with him," Greenwood said. "It was always wonderful working with him as a speaker, because he would speak and then I would sing. And it kind of worked that way every time."

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He revealed that the last time he saw the former president was at the Bush family compound in Kennebunkport, Maine, in August.

"[I] had a moment to sit at the piano and play him a song or two. And I did actually play him a little version of 'God Bless USA' and he would sing along with me, as I know he's done for other people," Greenwood said.

He said that Bush had a "genuine heart" and cared about other people, including Greenwood's two sons, who the former president kept in touch with over the years.

"Generally the case when you would meet him on any occasion [was] he would kind of give you a big hug like you were a member of the family, and it made you feel like you were a member of his family."

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