"Substance" is a song by American singer Demi Lovato. It was released through Island Records on July 15, 2022, as the second single from her eighth studio album, Holy Fvck (2022). She co-wrote the track with Jutes, Laura Veltz, and its producers Alex Niceforo, Keith Sorrells, and Warren "Oak" Felder. It is a pop-punk and rock track, incorporating guitars and drums. The lyrics of the song include a criticism of the contemporary society.

The Holy Fvck Tour was the seventh concert tour by American singer Demi Lovato in support of her eighth studio album Holy Fvck (2022). The tour, consisting of 34 dates, began on August 13, 2022, in Springfield, Illinois, and ended on November 10, in Rosemont, Illinois. Through its three legs, the tour visited both North and South America, with support acts including Dead Sara and Royal & the Serpent.