[11] In July, the band had their debut performance with Christensen's original compositions at Luna Lounge on Manhattan's Lower East Side.

[13] Under the RCA label, Stellastarr released an eponymous album in September 2003, featuring the standout singles "Jenny" and "My Coco".

Christensen's progression as a singer was praised, with his tone being noted for having matured and become more consistent beyond his shifting between falsetto and baritone vocal registers.

[15][16][17] Stellastarr released their final album, Civilized, through their personal imprint label Bloated Wife Records, in July 2009.

[11] While Stellastarr was on the Hot Fuss Tour alongside the Killers in 2004, Christensen collaborated with Jason Dolan on a feature-length spec script for a drama called Sidney Hall - he shared it with Paul Wesley, who presented it to William Morris Endeavor, resulting in the signing of both screenwriters.

[21] After a week-long bidding war in February 2010, Lionsgate Films acquired the screenplay for Abduction, with actor Taylor Lautner attached.

[28] Prior to Curfew's success, Paul Wesley took an interest in the short film and together with Christensen and his producing partner, Damon Russell, collaborated to develop a feature-length adaptation.

[18] The film, titled Before I Disappear, premiered at South by Southwest on March 10, 2014, and won the audience award for Best Narrative Feature.

[35] Christensen expanded his direction efforts to fiction podcasts with Blackout, the first series produced by QCode that was released in March 2019, starring Rami Malek.

[37] Christensen directed the narrative thriller Hunted, the first podcast produced by Wolf Entertainment's Endeavor Audio division, starring Parker Posey, released in November 2019.