When I heard about the pet project of Jenny Lewis (Rilo Kiley, Postal Service) and her Scottish-American singer-songwriter boyfriend Johnathan Rice, I was prepared for a precious, cloying experience. I anticipated solipsism and a heavy dose of wince-worthy cutesy-poo — like a mildly more legit She & Him. But you know what? Yes, Jenny & Johnny’s brand-new debut, I’m Having Fun Now, is full of sweet duets and a touch of starry-eyed schmaltz, but these two are compelling songwriters and well-suited collaborators, and that didn’t just vanish once they started sharing a bed. Rice and Lewis both contributed heavily to Elvis Costello’s 2008 release Momofuku, and their appreciation for the bopping, new wave-tinged rock ’n’ roll of The Imposter is clear on tunes like “Scissor Runner” and “Big Wave.” It’s sturdy, catchy, sunny, upbeat indie pop — with the occasional organic, folky flourishes you’d expect — and likely Lewis’ best output in a few years.