UK singer-songwriter Natasha Bedingfield has cemented her place in the pop music hall of legends by way of “Unwritten,” her gooey ode to self-empowerment from 2004. But tarry on she has in the 15 years since, with less beloved, but equally delightful earworms like “I Wanna Have Your Babies” and “Pocketful of Sunshine,” and the small triumph that is her new album Roll With Me. Working with pop producer par excellence Linda Perry, the record makes great use of Bedingfield’s flexible voice, letting touches of blues grind edge into her various personae: disco diva, coy princess, screwed up lover, and pure goofball. by Robert Ham