"In My Head" is a song by American rapper Lil Tjay. It was released as a single through Columbia Records and Sony Music on April 1, 2022. The song samples British singer Iyaz's 2009 debut single, "Replay". Due to sampling "Replay", Iyaz, producer J. R. Rotem, R. City duo members Timothy and Theron Thomas, and American singer-songwriters Jason Derulo and Sean Kingston are credited as songwriters alongside Tjay. "In My Head" was produced by Yoshi and Yvng Finxssa, mixed by Robbie Soukiasyan, mastered by Eric Lagg, and recorded by Barrington Hall.