The old adage “big things come in small packages” has perhaps never been more fitting for an artist than in the case of Jennings, the one-name moniker of New York based siren Mary Jennings.

Standing just a shade over five feet tall, Jennings delivers a robust and heartfelt sound that is anything but small-scale. Her music reflects an enormous strength and drive that is uniquely hers, combining a deep range of rock and pop influences with an unabashed sense of vintage style that few, if any,...