"4th Dimension" is a song by American hip hop duo Kids See Ghosts, composed of the rappers Kanye West and Kid Cudi, from their eponymous debut studio album (2018). The song features a guest appearance from Louis Prima, who was credited as a featured artist due to his work being sampled. It was produced by West, with additional production from Mike Dean and Noah Goldstein. The producers co-wrote the song with Kid Cudi and Prima, with the latter of the two receiving credit as a result of it sampling music by him. A hip hop song, it samples Prima's "What Will Santa Claus Say " and Shirley Ann Lee's "Someday". Lyrically, the song features Kids See Ghosts presenting their thoughts to stop themselves from becoming worried.