IU's concert, the '2024 IU H.E.R. World Tour Concert in Seoul', took place at the KSPO Dome, Songpa district, Seoul, on March 2, 3, 9, and 10.
The singer's recent concerts featured a stellar lineup of guest performers, including K-pop girl groups NewJeans, LE SSERAFIM, K-pop boy group RIIZE, and actor Park Bo Gum.
Many other celebrities were in the audience seats throughout the concerts, including the singer's boyfriend, Lee Jong Suk, Chinese actress Tang Wei, entertainers Yu Jae Seok, Park Myung-soo, and Yang Sechan.
Plus, Kim Soo Hyun attended IU's concert on March 9; several audience members shared photos and videos of the actor online, in which he was enjoying the concert in casual clothes.
Kim Soo Hyun's presence at the concert gained extra attention since his first project in three years, tvN's drama 'Queen of Tears', premiered on the same day.

Some wrote, "My friend said that Kim Soo Hyun was sitting in the same row as them and that when IU was getting song requests, he was shouting 'Only I Didn't Know' A LOT, lol.", "A friend of mine went to IU's concert today and sat in the same section as Kim Soo Hyun. They said he yelled 'Only I Didn't Know' until IU stopped receiving the requests. They thought he was crazy about the song. They also said he sang along to the song 'Nagging'."

アンアンコールのIUちゃん可愛すぎるのとその時のキムスヒョンの나만 몰랐던 이야기の叫び声も可愛すぎた��
— 유 (@yrMiLsDbp9JFnEo) March 10, 2024
推しのコンサート見ながら推しの席近くで見ることが出来て幸せすぎました#IU #HER_WORLD_TOUR #아이유 pic.twitter.com/Mw7YsNnMEt
Meanwhile, Kim Soo Hyun and IU co-starred in KBS' drama 'The Producers' in 2015, and Kim Soo Hyun starred in the singer's 'Ending Scene' music video in 2017.

(SBS Star)