出道至今所有專輯及主打歌
正規專輯
Growing Up
Boo
http://youtu.be/g3TP6XZ1Baw
You Know(Rock ver)
http://youtu.be/7WINyXmPRAE
Last Fantasy
You & I
http://youtu.be/f_iQRO5BdCM
You & I (performance ver.)
http://youtu.be/NJR8Inf77Ac
Modern Times
The Red Shoes
http://youtu.be/Q0xvVgKJxfs
The Red Shoes (performance ver.)
http://youtu.be/js3PTlQFakk
Modern Times - Epilogue
Friday
http://youtu.be/EiVmQZwJhsA
Paletta (2017/04/21)
https://youtu.be/d9IxdwEFk1c
팔레트 (Palette) MV
https://youtu.be/Rh5ok0ljrzA
이런 엔딩 (Ending Scene) MV
https://youtu.be/8zsYZFvKniw
Special Clip - 이름에게 (Dear Name)
先行曲 밤편지 (Through the Night) (2017/03/24)
https://youtu.be/cj_8wUhYk_o
MV Teaser
https://youtu.be/BzYnNdJhZQw
MV
https://youtu.be/GU1mD9MOoHE
IUTV - MV Making of
先行曲 사랑이 잘 (Can‘t Love You Anymore) With OHHYUK (오혁) (2017/04/07)
https://youtu.be/fWoVvVVd84A
Teaser
https://youtu.be/8H1D7XUPNFI
Live with 오혁
Palette 打歌舞台 Live YouTube Link
https://www.youtube.com/playlist?list=PLu7zf-xBPIznf-x3nrC_E6bdpZx4yAQxu
迷你專輯
Lost and Found
Mia
http://youtu.be/0ZukHxqOA0o
iu...im
Marshmallow
http://youtu.be/slT80EySpKk
Real
Good Day
http://youtu.be/jeqdYqsrsA0
Real +
The Story Only I Didn't Know
http://youtu.be/UpuWJr821rY
The Spring of Twenty
Every End of The Day
http://youtu.be/mzYM9QKKWSg
Chat-Shire
Twenty-three (스물셋) MV
https://youtu.be/42Gtm4-Ax2U
2015 SBS歌謠大戰 Twenty-three 舞台
https://youtu.be/aZGaSrI0RoY
MelOn Premiere Showcase - IU
https://youtu.be/6pFJDR4myaQ
Special Clip
Knees(무릎)
https://youtu.be/L1JUfCyeT5E
Zezé(제제)
https://youtu.be/zfRs5hJuh98
The shower(푸르던)
https://youtu.be/TRTquokWSCw
Remake Album
A Flower Bookmark
My Old Story
http://youtu.be/npttud7NkL0
Meaning of You
http://youtu.be/4L-H_cXSNhQ
Remake Album Teaser
http://youtu.be/LWx9LdgXjKM