“Do you mind if we do an old Australian folk song?” Crowe asked Fallon.
“We love Australian folk songs!” Fallon exclaimed.
“It’s by, uh, Johnny Cash,” Crowe joked.
He then went on to wow the crowd with his impressive set of pipes.
Fallon gleefully joined in on harmonica, with The Roots enthusiastically backing him up.
The man in black would be proud.
Watch Crowe’s performance below: