Hitting the high notes

LIKE his previous big-screen musical Once, John Carney hits all the right notes in his new indie rom-com-with-a-differnce, Begin Again.

It's the Irish filmmaker's lo-fi love letter to New York - complete with a tasty soundtrack and a very charming and on-key Kiera Knightley impressing with both her acting and vocal chops.

She plays Gretta, a talented singer-songwriter who's reluctant to share her gift with anyone except with lo…