All of the designer outfit princesses (and princes) I've painted over the last two months.
For some of them the full image is posted here on dA, others on my Tumblr.
Belle and Beast: [link]
Tiana and Naveen: [link]
Jasmine and Aladdin: [link]
Pocahontas and John Smith: [link]
Mulan and Shang: [link]
Ariel and Eric: [link]
Cinderella and Prince Charming: [link]
Snow White and Prince: [link]
Rapunzel and Eugene: [link]
Aurora and Philip: [link]
Watercolours+ pencils for all the images, bit of indian ink for some, cropping and texturing in Photoshop. Texture from here: [link]
(originally from the Disney Store website).
--To clarify some of the comments that I have got: Please note these dresses are NOT my original designs, they are simply fan art of the Disney Store Designer Princess range.