Jodi Benson, the voice of Ariel, Paige O’Hara, the voice of Belle, and Judy Kuhn, the singing voice of Pocahontas, all had cameos in the movie Enchanted!
Jodi Benson appears in three scenes as Robert’s secretary, Sam. Incidentally, during one of her scenes, when Giselle looks into the fish tank, you can hear a muzak version of “Part of Your World” from that movie.
Paige O’Hara appears in the soap opera that Nathaniel and Prince Edward (though mostly Nathaniel) watch. She plays a character named Angela (named after Angela Lansbury, who played Mrs. Potts) and is speaking to a man named Jerry (named after the late Jerry Orbach, who played Lumiere) and one of them mentions a character named Ogden (named after David Ogden Stiers, who played Cogsworth). In the background of that soap, you can hear the title song from Beauty and the Beast.
As for Judy Kuhn, she has a very brief one-line cameo. She plays a pregnant woman with kids who lives in Robert’s apartment building. She is the first resident to be visited by Prince Edward. When he opens the door, she just says, “You’re too late.”