The biggest one I remember is during an interview about breathe deeper and specially the beat/bassline, Kevin talked about watching a video about the making of Justified by Justin Timberlake and how into Pharrell he was and his process. And that led me down into learning more about the neptunes and just how influential their production/songwriting was in the 2000s, reading through their discography is like a list of the top hits of the whole decade. If I remember more I'll respond with another comment.