Vidal was born in Santa Barbara, California, moved at an early age to Brooklyn, New York, and then to Ithaca, New York where she began studying violin. She started her first band, an all-girl punk group, while a student at Ithaca High School. Her band, Kiev (later changed to Kievan Rus to avoid name conflicts with a California band of the same name), played in two Warped Tour events,and toured briefly with Bad Religion, Anti-Flag, and Gogol Bordello. Bad Religion's Greg Graffin took an early interest in the band, and produced their EP Kievan Rus.
The band was cast in a series of Coca-Cola commercial called "Girl Band" directed by cinematographer Lance Acord that aired in 2005.Mike Viola provided lyrics and musical direction for the commercials, but 'Kiev's' music was used for the series of ads. Various articles referenced the Coke ad highlighting the DIY attitude of the band, the documentary style used by Acord for the Coke "Real" campaign, and the ironic juxtaposition of a real "girl band" in an advertisement being more "real" than the reality TV show "American Idol" during which it aired.
Vidal started a new project, Your Kid Sister, while an art student at Concordia University in Montreal. Your Kid Sister began as an homage to Rancid, her favorite punk band, and she covered Rancid songs in the persona of Tim Armstrong's fictional younger sister. Rancid's ...And Out Come the Wolves was a major influence and during the Your Kid Sister project, Vidal always performed while wearing a wolf hat. Her music video for the song, "Poison", was made during a summer class at Cornell University taught by animator Lynn Tomlinson.
In 2009, Vidal moved to Barcelona and began writing new material while continuing to perform Rancid covers as Your Kid Sister, and playing in other bands. She independently released the album 'Poison: 5 Rancid Songs That I Love' in 2010.