When I saw this I immediately thought flowers and since the pink seems to be the main focus I decided to make my card by using the purple tones. So, here it is:
Since I have a very small amount of variety in paper I used Elegant Eggplant as the base and then (sorry that you can't see it) sponged Whisper White with some different blue chalks to try and give it a sky effect. The colors on the card are also different shades of purple and I put some pearls on the butterflies. I colored the flowers with markers and tried to match how in the pic the flowers have the light color on the outside and the dark color on the inside. Enjoy!