If you mouse-over the image, you can see it displayed on Stormer.

The eBay seller believes that  this fashion never made it out of the "first stage" [of production].  He thinks the prototype was made, but Hasbro decided to work on other fashions instead.  A Hasbro source has confirmed that only two of these fashions exist.

This 2-piece fashion was designed for the "Music is Magic" line. It also had a matching hairpiece which is not shown, nor sold with the fashion.   The hairpiece was also green and orange.    This version has hand-painted designs onto the fabric.  

According to the eBay winner, he received the fashion without the prototype tag.  However,  Bradford206 says the number is most likely: # 610152-01M for this one, from the Design Department, and # 610152-02M for the second version from the Engineering Department.

This is the second version of this Music is Magic prototype fashion.  According to the seller's description, the prototype number is: # 610152-02M.  Although the print is hand-painted, it is still bright and colorful.  The bodice and tails are a bright red/orange, soft vinyl, and the trim is a bright green lame. This fashion is a revised version of the one shown on the left.  Included in the auction were the hairpiece, jacket, pants, patterns, and Polaroid of the fashion on a doll, from 1986.