Johnny Cash is undoubtedly one of this country's first real rockstars. Now rockstars come in all kinds of different forms from actual rockers, to badasses like the Denver Broncos quarterback, Peyton Manning. 

So in the case of this video from a fan, one rockstar (Peyton Manning) gave us a little treat using his vocal chords instead of his famous arm, singing a song from a fallen rockstar (Johnny Cash).

More than $1 million was raised for the kids at Peyton Manning Children's Hospital at St.Vincent in Indianapolis.