This prolific singer-songwriter has been winning fans in high places—she's performed for the President and First Lady earlier this year. The hard-working Yamagata has appeared on recordings from Toots & the Maytals, Ryan Adams, Bright Eyes, and—curiously—Mandy Moore. When the singer-turned-actress wanted to record to a more mature album, she enlisted the singwriting help of Yamagata, before hitting the road together. She's touring ahead of the release of her fifth and latest EP, Heavyweights, which comes hot on the heels of 2011's independently released, Chesapeake.