Ever So Slowly is a song by The Friendly Indians (the creators of the Psych theme I Know, You Know) from their 1996 album Greetings... from Lake Dolores that appears in S3E8 "Gus Walks into a Bank" alongside another one of their songs, Genius. These are the only two songs by The Friendly Indians that are part of the Psychverse besides the theme song.
About two minutes of Ever So Slowly can be heard in the Psych office at the end of the episode when Juliet visits Shawn to return Gus's shoes and the two decide to take a stroll on the boardwalk while eating hotdogs.