In “4U” PRETTYMUCH come to the realization that despite their promises, they’ve fallen in love, hard. The original version of the track was written by band member Brandon Arreaga in December 2018. During a May 2019 livestream his sister, Halie revealed that in “4U” and “Temporary Heart” were written only days apart.

The track marks the first time band member Nick Mara has sung lead vocals on a PRETTYMUCH release.

Before “4U” was released, the band teased the song’s bridge, tweeting: “Just get ready to scream “I LOVE IT I LOVE IT” on tour.” Fittingly, Austin Porter, who sings the part, told Schlön! that the song was his favorite from Phases.