Thank you Bexa! Always glad to see more IU here.
There was a bit of a mix up with which videos to watch, but I think that's all straightened out now, and we'll get to see more live performances soon.
As far as songs that have never had a live ... I would like to hear L'amant (the last track on the album) someday.
Some of IU's backup dancers (and other staff) have been with her for a very long time. There's a cute video from a wedding between two of her dancers, where IU sings Good Day and the bride and groom join in the choreo.