"Taylor is the hardest working artist I've ever encountered," Aaron told People in a new interview. "She is involved in every aspect of writing and producing her songs and has an incredible attention span and focus on detail."

The 47-year-old songwriter/musician continued, "And she never really stops writing songs. The world has seen her play 44 songs a night on tour now, performing for over three hours. She makes it look easy but it's really a feat of incredible endurance."

Aaron, best known as a founding member of the indie rock band The National, compared the Anti-hero hitmaker to music icon Bruce Springsteen.

"It's hard to think of an example of someone who matches that kind of output, except maybe Bruce Springsteen, but he doesn't have to cover as much ground as Taylor does up there," Aaron stated.

The songwriter also noted that in the time he has known the Love Story singer, 33, he has never seen anyone "wait on her".

"Similarly, I've spent a lot of time with her and I've never seen anyone wait on her," Aaron shared. "When I have stayed at her house, Taylor herself was cooking everyone breakfast and dinner. She's legitimately just a very down to earth and hardworking person."

The duo first worked together on Taylor's 2020 album Folklore. They then went on to create her eighth studio album, Evermore, and have continued to work together.