As a solo artist, Fannan has shared the stage with other prominent musicians such as Hunter Burgan (AFI),[2] Carla Azar (Autolux), Rich Good (Psychedelic Furs), and Dash Hutton (Haim and Mini Mansions).

Fannan spent much of her childhood encouraged to sing and perform; she later recalled acquiring a key to her school's choir room, where she would often eat her lunch and play the piano.

[3][4] In 2007, while performing in Santa Cruz, California, Fannan was invited to sit in with psych rockers Sleepy Sun, and was quickly recruited to be their co-lead vocalist.

to collaborate on the musical project Anywhere, which also included Mike Watt (Minutemen, The Stooges) and Cedric Bixler-Zavala (The Mars Volta, At the Drive-In).

In 2019 she was invited to record and tour on Canadian rock band Black Mountain’s 5th full length album Destroyer and is heavily featured.

In early 2012, the band began performing as an all-woman group, with Fannan being joined by bassist Micayla Grace (Bleached, Leopold and His Fiction), guitarist Cecilia Peruti (Gothic Tropic), and drummer Lia Braswell (Le Butcherettes).

Other musicians that have previously played with the group include Amy Aileen Wood (Fiona Apple), Jon Sortland[14] (Cigar, Broken Bells), Rich Good (Kings & Queens, Psychedelic Furs), Evan Weiss (Slang Chickens, Wires on Fire), Dash Hutton (Slang Chickens, Wires on Fire, Papa), lead guitarist Brandon Intelligator (Slang Chickens),[15] Jeff Lynn (Wires on Fire), Patrick Taylor (Ceremonies), Lucas Ventura, and Wade Ryff.