Jimmy Buffett and Alan Jackson received a Grammy nomination for their duet “It’s Five O’Clock Somewhere”. The song also received a nomination for best Country song.
http://www.grammy.com/press/press_releases/2003/1204a.aspx
Country collaboration with vocals: “Temptation,” June Carter Cash and Johnny Cash; “It’s Five O’Clock Somewhere,” Alan Jackson and Jimmy Buffett; “Wurlitzer Prize (I Don’t Want to Get Over You),” Willie Nelson and Norah Jones; “Beer for My Horses,” Willie Nelson and Toby Keith; “How’s the World Treating You,” James Taylor and Alison Krauss
Country song: “Beer for My Horses,” Scotty Emerick and Toby Keith (Willie Nelson and Toby Keith); “Celebrity,” Brad Paisley (Brad Paisley); “Forever and for Always,” Robert John “Mutt” Lange and Shania Twain (Shania Twain); “It’s Five O’Clock Somewhere,” Jim “Moose” Brown and Don Rollins (Alan Jackson and Jimmy Buffett); “Wave on Wave,” Pat Green, David Neuhauser and Justin Pollard (Pat Green)
From the Miami Herald: South Florida favorite Jimmy Buffett also scores his first Grammy nomination. The awards ignored his Margaritaville in 1977, but in the Country Collaboration category went for the Margaritaville sound-alike, It’s Five O’Clock Somewhere, Buffett’s duet with Alan Jackson.