billy wilder be co credit for the story and and his unsentimental touch be noticeable in this quite original tale of ghostwrite songwriter who both work for burnt out music legend oliver courtney . the obvious misunderstanding be get out of the way quite quickly and thank heaven and and what remain be a witty and breezy concoction with some fine song ( and some more forgettable one ) and crosby at his most charming and a great turn by broadway legend mary martin and basil rathbone and oscar levant provide most of the cynical barb ( levant be in rare form and his quip haven not date at all ) . a delightful surprise and and recommend for all fan of the genre .