Specializing in rockabilly with a look to match, Dublin-born Imelda May has an extensive repertoire of cool covers and self-penned songs. Jools Holland is excitable by nature, but when he spots a new artist who has what he considers “it,” his enthusiasm goes off the scale. To go by his reaction to Imelda May, she has “it” in spades. “I’ve got to have you on the show,” he told her after seeing her play live – and so, a couple of months ago, she duly found herself on “Later With Jools Holland,” wowing an audience who included Jeff Beck, Elbow and Roots Manuva.