Smash Mouth’s version of “I'm a Believer” plays over the closing credits of the 2001 film Shrek.
The song was originally written by Neil Diamond and became famous through the Monkees’ 1966 recording. Smash Mouth recorded a faster, pop-rock version for Shrek, and it appears during the joyful closing sequence as the film’s characters celebrate the resolution of the story.
The song became strongly associated with the movie and helped establish Shrek’s reputation for combining fairy-tale animation with recognizable contemporary music. Smash Mouth also performs “All Star,” another song closely linked with the Shrek franchise, but that track appears near the beginning of the first film rather than over its closing credits.
Because both songs are by Smash Mouth and both are connected with Shrek, they are frequently mixed up. The specific closing-credit song is “I'm a Believer,” while “All Star” is used in the opening portion of the movie.