Luke Bryan on duet with Peyton Manning

Peyton Manning might be a four-time NFL MVP, but a country singer? Not so much.

Just a few weeks ago, Manning joined country star Luke Bryan on stage at Manning's Children's Hospital gala in Indianapolis to sing a few songs, including Johnny Cash's "Folsom Prison Blues."

"I think he did pretty good considering he's a pretty awesome quarterback," said Bryan, who recently was named ACM's Entertainer of the Year. "Well, maybe he didn't sing that great. But his heart is in the right place."

Manning invited Bryan to his yearly charity event, and Bryan said, "I took about 1 second to say yes."

There was some good-natured college ribbing going on. Manning graduated from the University of Tennessee, and Bryan went to Georgia Southern but is also a huge Georgia Bulldogs fan.

"We had a great couple of days. We played golf. We hung out," Bryan said. "I had never met him before that weekend. I was always a huge fan. He's such a driven athlete."

Now Bryan, who is equally driven, is set to hit the road for his Dirt Road Diaries Tour and is finishing up his next album.

"Life has never been better. I'm getting these amazing opportunities," Bryan said. "It's time now to get back on stage where I love being. I'm having a blast up there, and I want to give the fans a great experience."