"Kimi ni Muchū" (君に夢中, "I'm Crazy About You") is a song recorded by Japanese-American singer Hikaru Utada.

Music critic Koremasa Uno pointed out the similarities between "Kimi ni Muchū" and Utada's 2008 track "Stay Gold" in the prelude and chord progression.

Nanami Ikusa of Numero Tokyo praised the track's production and said "this is a sound that can only be produced by Hikaru Utada among Japanese artists today.

[4] The music video for "Kimi ni Muchū" premiered on YouTube on December 9, 2021, the 23rd anniversary of her debut in Japan.

The video uses part of the performance and behind-the-scenes clips from her online concert "Hikaru Utada Live Sessions from Air Studios" in London, England, which was made available on the release day of Bad Mode on January 19, 2022.