During a blissfully rare calm in the hectic storm of Ponyville life, a disturbance in the Everfree Forest goes undetected. After receiving a summons from the Princess, Twilight and her friends are led into a curious task, one that they find themselves ill-prepared to handle - managing their stallion double! As each of the girls meets their very own carbon-copy-colt, they learn that dealing with themselves can be much more frustrating than they first thought.

Annoyingly, irritatingly, intoxicatingly frustrating.

http://www.equestriadaily.com/2011/10/story-giving-love-helping-hoof.html