Editing Reel Big Fish (section)

===2001–2006: Major label years===
Trumpet player Tavis Werts left the band in 2001.<ref>{{cite web|url=http://www.absolutepunk.net/showthread.php?t=180600 |title=Reel Big Fish - 10.18.06 - Interview |publisher=AbsolutePunk.net |access-date=October 15, 2011}}</ref> Former [[Suburban Rhythm]] drummer [[Carlos de la Garza (music producer)|Carlos de la Garza]] and former [[Spring Heeled Jack (band)|Spring Heeled Jack]] trumpeter Tyler Jones, who tracked for two songs on ''[[Cheer Up! (Reel Big Fish album)|Cheer Up!]]'' (because Werts had already recorded the majority of his trumpet parts before his departure), were brought in. De la Garza's last concert with Reel Big Fish was on June 20, 2003, at the [[House of Blues]] in [[Anaheim, California]]. That concert was later released as a DVD in ''[[The Show Must Go Off!]]'' series. Jones appeared in the music videos for "Where Have You Been?" and "Monkey Man" (although neither featured any trumpet-playing), and continued to play live with the band until September 2004. Jones was replaced by trumpeter John Christianson, who had previously played with Barrett in the band, [[The Forces of Evil]].

On April 5, 2005, the band released its fourth album on Mojo, ''[[We're Not Happy 'Til You're Not Happy]]''. Justin Ferreira (who replaced De La Garza) was on drums for the recording, but left before the album's release to join the Orange County band [[Takota]] and subsequently is listed as an additional musician on the CD. He was replaced by [[Ryland Steen]].

Compared to the previous album (''Cheer Up!''), which was more lighthearted and cheerful, Allmusic describes the songs in ''We're Not Happy 'Til You're Not Happy'' as "angry" and "embittered", but also deemed the album as "super catchy". Common themes expressed throughout the songs include jealousy, regret, short-lasting fame, and disappointment toward mainstream record companies.

Aaron Barrett has stated that ''We're Not Happy 'Til You're Not Happy'' was "the third record in a trilogy" that began with ''[[Turn the Radio Off]]''. "The first one was about being in a band and trying to make it. Then ''[[Why Do They Rock So Hard?]]'' was like, 'we've made it, we're rock stars'. ''[[Cheer Up! (Reel Big Fish album)|Cheer Up]]'' we made because we had to make it. But ''We're Not Happy 'Til You're Not Happy'' is about us being old and jaded now."<ref>{{cite web|url=http://www.inmusicwetrust.com/articles/70h07.html |title=INTERVIEW: Reel Big Fish: Aaron Barrett discusses 15 minutes of fame, new record, and SKA's next generation |publisher=In Music We Trust |access-date=July 9, 2011}}</ref>