I adore the idea of a knitted sweater over a floral dress. Nicole is wearing a mint green sweater along with a Winter Kate collar dress from the Spring/Summer 2013 collection.
Here is my version of Nicole's look
Your simple checklist for Nicole's outfit:
-Floral print dress
What I Wore:
Dress: Winter Kate Printed Cotton & Lace Maeve $29 Hautelook
Sweater: Old Navy Knitted Top $4
Jewelry: House of Harlow 1960 Trikona Necklace $75 (purchased for $25) Lord and Taylor
Shoes: Cole Haan Manhattan Ballet in Sandstone $158
Sunglasses: House of Harlow 1960 Jordana $75
Bag: Givenchy Nightingale $150 TJMaxx
I am unsure of Nicole's shoes in the photo, but I could totally see her pair this outfit with some cute House of Harlow 1960 flats or a pair of oxfords.