[5] As a singer-songwriter, she has collaborated with Mark Ronson, Sublime with Rome, Tim Armstrong of Rancid, Billie Joe Armstrong of Green Day, Linda Perry, Lee "Scratch" Perry, Jimmy Cliff, the Mighty Mighty Bosstones, Travis Barker, Dirty Heads, and Tom Morello.

[7][8] Allen began singing in bands in Montana and moved to Los Angeles at the age of 18 to pursue a career in music.

[7] Allen was signed to Elektra after producer Randy Jackson saw her band perform live and heard her demo.

[10] Allen contributed to the songwriting of Unwritten Law's 2005 album Here's to the Mourning, including the single "Save Me (Wake Up Call)", which was co-written and produced by Linda Perry and reached number 5 on the Billboard Alternative Songs chart.

[13] In 2007, her song "Stripper Friends" was re-worked and recorded by Kevin Michael featuring Lupe Fiasco as "We All Want the Same Thing".

[1] In 2011, Allen contributed vocals to the Sublime with Rome debut album Yours Truly, and was featured on the song "Safe and Sound".

[18] The Bar Stool Preachers released their album Grazie Governo on August 3, 2018, Allen was featured on the track "Choose My Friends".

[19] On June 4, 2021, Tom Morello announced a new collaborative project with The Bloody Beetroots called The Catastrophists EP.

The first single, "Radium Girls", featured four women: Aimee Interrupter, Nadya Tolokonnikova of Pussy Riot, Mish Way of White Lung, & Delila Paz of The Last Internationale.

The song is about the true story of the Radium Girls, young Illinois factory workers who were the victims of one of the most heinous crimes in US industrial history.

On July 16, 2021, The Dirty Heads released "Rage", a song featuring Aimee Interrupter and produced by Travis Barker of Blink-182.

[20] They met in 2009 on a tour that had Allen, a solo artist at the time, and the Bivona brothers' band, The Telacasters, supporting Dirty Heads and Sugar Ray.