"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.

Kids See Ghosts was an American hip-hop supergroup composed of musicians Kanye West and Kid Cudi. Formed in 2018 during West’s Wyoming sessions, the duo released their eponymous debut album in June of that year, through their respective label imprints, GOOD Music and Wicked Awesome Records. The album was met with critical acclaim, debuted at number two on the US Billboard 200, and was certified gold by the Recording Industry Association of America (RIAA). The duo disbanded in 2022 due to personal disagreements, and although they reconciled the following year, there has been no information regarding the duo's status.