From mid-2004 until May 2005, Collins performed in a band under the name Brotherhood of Lost Dogs with the drummer from Fountains of Wayne, Brian Young, and bassist Joe "Bass" Howard formerly of The Posies.

As of October 2007, Eve 6 officially said that they are returning minus Jon Siebels, who was replaced by a temporary guitarist, Matt Bair of "The Sequel".

Collins started a new project with Eve 6 bandmate Ben Hilzinger and Kenny Carkeet of Awolnation called Fitness.

In June 2020, the next Chevy Mustang single, "Can I Be Your Friend"[7] featured Evan Rachel Wood and a version of this song became an electronic birthday card option[8] at JibJab on August 31, 2020.

From April to September 2022, Collins wrote an advice column named "Heart in a Blender" for the Input section of the online magazine Inverse, covering various topics such as mental health, toxic family members, and drug use.

[10] Early 2025 it was announced Collins will be replacing Fountains of Wayne’s deceased bass player Adam Schlesinger on a set of festival shows later in the year.

[15] In December 2020, multiple media outlets took note of the fact that Collins had become a prolific poster to Eve 6's official Twitter account,[16] which was "quickly becoming a trove of internet comedy,"[17] including queries to various public figures asking if they "like the heart in a blender song,"[18][19][20][21] "choice tidbits ... about his fellow washed stars," and "generic observations about wallet chains, weight gain, and merch with palm trees on it, as well as a running bit about not knowing the difference between Vertical Horizon, Dishwalla, Matchbox 20, et al."[22] Loudwire crowned Collins the "new king of Twitter" and "the anti-Trapt of Twitter,"[23] the latter contrasting Collins' celebrated output with that of Trapt lead singer Chris Taylor Brown.