First off, giving credit to IG-64 from DA for the awesome background in last panal!
Looks like Pinkie Pie have decided to test a theory out on both the Birthday Pony and his Marefriend, and apparently it works, much to their dismay! XD
Rarity will have much on her hands for poor Fluttershy! w
ENJOY, and HAPPY BIRTHDAY, White!
Artwork (c) to Tofertheakita from DA
Whitelight (c) to Whiteluz from DA
Pinkie Pie, Fluttershy, and Rarity (c) to MLP:Fim & Equestria Girls