Apparently, this Yale graduate can equally master both political science and positively seductive jazz. Lauded for her artful dabbling in traditional folk and East African sounds, the Ethiopian-born Meklit Hadero can sit pretty with a Billie Holiday–esque flower in her hair, open her mouth and melt the crowd. Now based in San Francisco, Hadero travels north to play on Sunday, Aug. 28, at the Mystic Theatre. 23 Petaluma Blvd. N., Petaluma. $16. 8pm. 707.765.2121.