"Twilight Sparkle may be the smartest unicorn in Equestria, but there's more to life than learning magic. So Princess Celestia sends her to Ponyville on a mission to make friends. There, she meets Rainbow Dash, Pinkie Pie, Applejack, Rarity and Fluttershy. In all their exciting adventures together, the ponies learn important lessons about friendship, as they discover that friendship is the most powerful magic of all!" -- iTunes Store
Download for Free!
My Little Pony: Friendship is Magic True Friend Music video.
the fine print: Downloads posted on the Free iTunes Downloads blog are usually free for ~1 week. After that, you'll have to pay for them.