“I said I would change but I lied,” quips Jamie Cullum. Typically, he’s only half-kidding. The singer-pianist’s fifth album continues to deftly toe the line between swinging jazz and pure pop for now people, segueing from Cole Porter to lounge lizardry to Rihanna without batting an eyelash. But this time, he also tosses in some Coldplayish arena-rock and house music. Happiness awaits.