Retirement is serving Peyton Manning pretty well.

FOX's Chris Hoenig reports:

On Monday night, Peyton Manning was spotted at a Nashville bar, belting out 'Rocky Top', in honor of his alma mater, the University of Tennessee:

(Manning) "Rocky Top, you'll always be home, sweet home to me."

Next weekend, he'll serve as an honorary race official at NASCAR's Food City 500 at Bristol, Tennessee, accompanying Dale Earnhardt Jr. during driver introductions.

Speedway executive vice president Jerry Campbell saying he doesn't think it's possible to pair two more beloved athletes in the state than Peyton and Jr.

Chris Hoenig, FOX News.

Watch Peyton Manning singing 'Rocky Top' at a bar in Nashville