Prior to joining the Smashing Pumpkins, she was a member of Radio Vago, Chicago alternative act Veruca Salt, Spinnerette, Twilight Sleep, and Light FM, the last of which opened for Billy Corgan's one-off band Backwards Clock Society in November 2009.

The following year, on September 24, 2013, The Cold and Lovely released their sophomore record entitled "Ellis Bell EP".

The group played a SXSW tour, supporting the re-release their Ellis Bell EP.

In May 2014, Fiorentino provided backing vocals to London band, The Microdance's début album New Waves of Hope.

That same year she opened a pet-sitting business in Los Angeles to take a break from the music industry grind.

Fiorentino, who identifies as queer, did not publicly disclose her sexuality until 2015, saying "The whole time I was in the Smashing Pumpkins, I was very vocal about my feelings on gay rights, but I never discussed it in terms of my own experiences.

"[14] With Veruca Salt With Light FM With The Smashing Pumpkins With Cold and Lovely With The Microdance With Bizou With Louise Post