If you got picked for the show, you could meet Tiana and Naveen aboard the boat after the main show.
Alternatively, Tiana and Naveen currently meet their fans in Liberty Square, behind the the Ye Olde Christmas Shoppe and Liberty Tree Tavern. Louis and Dr. Facilier do not meet their fans.
The show has now ended sadly. It was an incredibly popular show, and not without good reason. It was lively, interactive, featured great music and added some real energy to the otherwise calm Rivers of America.