The background music from Fluttershy's first photo shoot with Photo Finish in Episode 20: Green Isn't Your Color of My Little Pony: Friendship is Magic.

Music by William Anderson.

You can still here some echo-y parts of the speech, due to the way the audio is encoded (I think that's why; the point is I couldn't get rid of it completely)

MP3 Download:
http://www.mediafire.com/?16b1dgy06bzz9h1

Do you want an official MLP:FiM original soundtrack release? Hasbro will likely only consider it if they see the support (and therefore potential sales) for an OST release. So sign the petition! (and if they do release it you better buy it - Pinkie Pie is watching - ALWAYS watching)
http://www.petitiononline.com/p1nk13pi/petition.html
The more fan support, the better the chance of it happening!