By JAKE COYLE/The Associated Press

INDIO, Calif. — Tegan and Sara, the identical twin powerpop duo, are accustomed to writing intimate, emotional songs about heartbreak.

But when performing, for every song like “Back in Your Head,” there’s a balance of silliness. Between nearly every song played by the singing-songwriting pair, the two casually — often hysterically — banter back and forth in what amounts to indie music’s answer to Laurel and Hardy.

“Sometimes I like it more than music,” said Tegan Quin in an interview backstage at the Coachella Valley Music and Arts Festival.

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