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Tim McGraw is helping "Sports Illustrated" honor the publication's most celebrated issue. 

He's singing "Lookin' For That Girl" on the TV special "Sports Illustrated Swimsuit: 50 Years of Beautiful."  The country star says the show's taping marked his debut performance of the song. 

McGraw also praises the show's producers, saying they "incorporate some great shots of the models throughout the years." 

Tim isn't the only performer for the show.  Lady Antebellum contributes a song as well, along with The Fray, John Legend, and Enrique Iglesias. 

Former "SI" swimsuit models Tyra Banks, Christie Brinkley, and Kate Upton are among the stars who make appearances, while former "SI" swimsuit issue cover girl Heidi Klum hosts the show. 

"Sports Illustrated Swimsuit: 50 Years of Beauty" will air on NBC Monday night at 9:00 p.m. Eastern. 

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