Below is a link to an acoustic set he did for KEXP last week. In it, fans have made song requests put in a hat that he chooses from. Near the end of the set he picks a few songs that he admittedly doesn't remember how to play. During the set, he explains that he watched YouTube of his songs before the show trying to remember how to play some of them. This is a neat little view of what it's like to be a successful artist who has written many songs - It's hard to remember all of them.

https://www.youtube.com/watch?v=gxU3Y1ot5yY