Ravishingly means in a ravishing way — so beautifully that it almost knocks you over. People often park it in front of beautiful itself: ravishingly beautiful. That doubling is common, and a little extra, like cream on cream; it does not add a new meaning, it only turns the volume up. You will hear it in reviews and old-fashioned praise, not much in everyday talk. It is an adverb, so it tells you how something looks or is done, rather than naming the person.