In 1981, she founded the Bangs, later renamed
the Bangles, with her sister Debbi Peterson and
Susanna Hoffs. After the Bangles disbanded in 1989, Peterson played with the
Continental Drifters and the Psycho Sisters, in both cases with
Susan Cowsill. In addition to performing their own material, the Psycho Sisters freelanced as backing singers (
Steve Wynn's
Fluorescent,
Giant Sand's
Center of the Universe), and Peterson has contributed harmony vocals to recordings by the
Hoodoo Gurus,
John Doe,
Tom Petty and
Belinda Carlisle. Additionally, she filled in for a pregnant
Charlotte Caffey on the 1994–1995
Go-Go's reunion tour. In 1999 the Bangles reformed and have recorded and played sporadically. Peterson married musician
John Cowsill, brother of her Continental Drifters and Psycho Sisters bandmate Susan Cowsill, on October 25, 2003. The couple have no children together. An earlier relationship had ended when her fiancé Bobby Donati died of leukemia in 1991. Peterson lived for several years in
New Orleans before relocating back to
Los Angeles. In August 2014, after playing together as the Psycho Sisters for more than 20 years, Peterson and Susan Cowsill released their first album, titled
Up on the Chair, Beatrice. In 2017, she and John Cowsill joined
Bill Mumy as the band Action Skulls to release an album (also including posthumous contributions from the bassist
Rick Rosas) titled
Angels Hear. == Gear ==