Surprisingly, Johnny Cash is one of the most covered artists by cute kids. This dapper little fella takes on 'Ring of Fire' in this clip, and when there is no horn section to back him up, he improvises. The 4-year-old's enthusiasm and confidence are as charming as it gets. 

According to the description on YouTube, this kid's name is Valor Yost, and he's performing at the Hartford Theater in Wisconsin. A full band of grownups support the tiny frontman, who looks even smaller behind an acoustic guitar. Kudos to Valor for first learning the words, and then for his straight take on a classic country song.