Neil Young stopped by 'The Tonight Show' with Jack White on May 12, recording a Willie Nelson tune while on set.

Young and White were on the show to talk about Young's new album, 'A Letter Home.'

After the interview portion of the show, Young went into the booth and cut a cover of the Nelson-penned Patsy Cline song 'Crazy.' While there, he also played Ivory Joe Hunter's 'Since I Met You Baby,' which you can watch below.

'A Letter Home' was recorded during a well-timed visit by Young to White's Third Man studio in Nashville. He recorded the album using the same Voice-o-Graph technology that Jimmy Fallon had on set at 'The Tonight Show.'

“I spent a year and a half restoring that record booth,” White said during the interview portion of the show of the vintage 1947 equipment. “I looked for 10 years for one and finally found it. Last year for Record Store Day we debuted it, and Neil happened to be in town with his electric car -- we both own electric cars, too, so we were getting together to talk about that -- and when he was there, everyone was using the booth for the first time.”

While he and Young were talking, White says, “A kid comes in and covers one of Neil’s songs in the booth.”

“Everybody got in and they’d do their thing and they’d have the record,” Young added. “I said, ‘Jack, I wanna try that.’ I went in there and did it and said, ‘Jack, I could do an album in there.’” The result was 'A Letter Home,' a collection of “songs by great songwriters that influenced me when I was growing up” -- classics from performers who could “play instruments, sing by themselves, and just deliver a song … If people can do things by themselves and carry the song, that’s what it’s about.”

'A Letter Home' is set for release on May 27.

Watch Neil Young Perform ‘Since I Met You Baby’ on 'The Tonight Show'