A cool little secret...
To get this achevement, you have to purchase the Deluxe Concert Stage under the "Smiles and Servos, inc" tab in the catalog.
This achievement also requires Orville Elephant, Music Man, El Chip, and Funtime chica. Then you must place the animatronics in this order: Music Man, El Chip, Funtime Chica, and Orville.
It's going to cost ya alot, but I think it's a cool easter egg. ^-^
(El chip is a knod to Chipper & Sons Lumber Co. if you haven't guessed already)
Once you've completed these steps, you will recieve a little sticker/stamp on the menu screen.