bring her to Causeway Bay outside SOGO in the afternoon
Arrange the flower shop and give her a bunch of flower in front of so many ppl or friends
(ask the flower shop guy to hold the flower, walking slowly across the traffic light, and then deliever the flower to her) Sure draw attention, surprise and happiness (make srue flower is pretty enough. If not... negative effect)
If got money, then can have a sign board message in SOGO TV as well
Then, all go to CEO for small birthday party
Having dinner in a nice restruant. Pick some nice one and food she like.