Kelli O'Hara<br> Review By STEVEN SUSKIN
To those who might have wondered whether Kelli O'Hara's recent successes in "The Light in the Piazza," "The Pajama Game" and "South Pacific" were due to strong material and skilled direction or just plain talent, O'Hara's perf at the Cafe Carlyle makes it clear: This is talent, pure and not so simple.