'Out Of The Blue' - 1996
No one seems to remember that she was on a one-season 1996 show called "Out Of The Blue" produced by Tribune Entertainment and Sam Riddle.
Joanna played perky Tammy in this show about late teens/early 20s youths working at Sea World in Orlando Florida. Tammy was the girlfriend of Timmy, played by Timothy Martinez.
The majority of the cast was all-Latino and they hung out at a coffee house called the "Java Lounge". Some basic info for this show is right here at IMDB:
http://www.imdb.com/title/tt0121008/