The song "I Still Haven't Found What I'm Looking For" is originally by the Irish rock band U2 from their 1987 album The Joshua Tree. It expresses spiritual yearning and has gospel influences. In 2021, Scarlett Johansson and U2 frontman Bono performed a duet version of this song for the animated film Sing 2. Scarlett Johansson, under her role as Ash, and Bono, as Clay Calloway, sing it together. This version was part of the Sing 2 soundtrack released in December 2021. The duet includes the same soulful lyrics about climbing mountains and running through fields, only to still not find what one is looking for. The song maintains its spiritual and emotional essence in this newer rendition for the film.