A blues-fired R&B singer with a countrified bent and a gospel and jazz background, New Yorker by way of Georgia Lizz Wright sometimes powers her smoky contralto to its full-throttle peak or its highest height, but the point is never to showboat. Wright will knock you out with lyrical power, stun you with beautiful, elegantly crafted melodies, shock you with vocal subtlety. Tonight, Friday, Feb. 11, at 7:30 p.m. The Birchmere, 3701 Mt. Vernon Ave., Alexandria. Tickets are $35. Call 703-549-7500 or visit birchmere.com.