As I understand it, these were encore songs. I admire IU, after 3.5 hours of the concert, she spends another hour with the fans at the encore concert. Good health to you IU. I'm a fan of her and I'm 55 years old. As they say, nature doesn't have bad weather, and it doesn't have fans of a certain age. I love her. Hello from Russia.
I'm 77 years old and I've been following IU since 2011. It's what IU does at most of her concerts is have an additional encore after the main show ends. Her shows usually lasts 4.5 to 5 hours. She chats a lot with her fans at these concerts so I think that is why the show is a long time. Her fans don't mind this at all. She will dress in something more casual during the encore portion of her concert. I think this helps her connect with her fans during those chat moments.
ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-EDDothv4_CQ.html I recommend the full encore vid! A singer performing encore for over an hour..She is phenomenal