J.A.C.K. is the third studio album by American pop punk band Forever the Sickest Kids. It is their first release through Fearless Records since their former label, Universal Motown, was shut down and is also the first release to not feature keyboardist Kent Garrison and lead guitarist Marc Stewart.The album was produced by Mike Green and was released on June 25, 2013.
With the departure of their past members and the label switch, the album reflects how the remaining members of the band came together and made positive changes when they were faced with negative challenges in their career and lives. Unlike their previous album, which featured numerous producers and co-writers outside of the band, the majority of the songs on J.A.C.K. were written solely by the members of the band. Mike Green was the main producer for the album, marking the first time the band had ever worked with only one producer for any of their releases.
Lyrically, the album deals with relationships, growing up, self-examination, the importance and values of friendship, stereotypes of America, and staying true to oneself. Like all of their songs, the lyrics are based off of the band members' personal lives and experiences.