When they’re sharing a stage, singing and playing jangling guitars, Susan Cowsill and Vicki Peterson exhibit a natural rapport. They engage in friendly banter and, most of all, their voices ...

The Bangles, from left: Vicki Peterson, Michael Steele, Susanna Hoffs and Debbi Peterson. The band broke big in the 1980s, scoring five Top 5 hits.

When they’re sharing a stage, singing and playing jangling guitars, Susan Cowsill and Vicki Peterson exhibit a natural rapport. They engage in friendly banter and, most of all, their voices ...