Emily Saliers and Amy Ray met in elementary school, started playing together in high school, and, 30 years later, are still making music as the Grammy-winning Indigo Girls. When the duo recently stopped by AG to do an Acoustic Guitar Sessions, they shared that the chemistry they felt when they began harmonizing and playing guitars together as teens has never waned.

Watch the Indigo Girls perform “Happy in the Sorrow Key” and “Learned It On Me,” from their new album One Lost Day, “Mystery,” off 1994’s Swamp Ophelia, and “Share the Moon,” a track from 2011’s Beauty Queen Sister. The folk icons also reveal how one of their biggest fans, Bon Iver’s Justin Vernon, invited them to his inaugural Eaux Claires festival to perform Swamp Ophelia in its entirety. And they talk about their songwriting process and the different kinds of acoustic guitars they’ve played over the years.

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