Lindsey Stirling, Courtesy. She’s sold hundreds of thousands of records, charted on both dance and classical music charts—with the same songs!—while wracking up countless spins on YouTube and Spotify. Yet when you talk to Lindsey Stirling, she talks with the passion (and speed) of someone who’s not sure how…

The Black Keys perform at Outside Lands 2015 in Golden Gate Park in San Francisco. Photo: Paige K. Parsons. If you attended this year’s installment of the Outside Lands Music Festival, you likely have already a list of your top favorite moments. But if you’re still trying to make up…