why does goofy, donald and mikey make an appearance in the little mermaid?

[AdamT]

That doesn't look like them.

 

[Lexy3643]

in the little mermaid donald, goofy and mickey make a very brief appearance in the little mermaid and i just wondered why. is is just a coincidence or is it deliberate? here's a link:
http://i15.photobucket.com/albums/a368/Tmnt_girl/dgm.jpg