Loved The Smurfs! She was doing voices as recently as '07
Yahoo
of personal note, a few years ago I wrote a brief article about voice actors for a site called Listverse. Here is what I wrote about her (obvie written before katy perry joined the movie)
"Into a show about the lives of 100 blue men, each just three apples high, came it’s first female character, Smurfette. Bliss, with only a few cartoons on her resume, won the part at the age of 65! She gave her character a very recognizable high-pitched yet raspy voice. There is a memorable discussion scene about Smurfette in the cult film Donnie Darko, and there is a planned trilogy of Smurf movies with “Heroes” star Hayden Panettiere rumored to be providing her voice. After “The Smurfs”, Bliss had a very busy voice-acting career and has been active in her nineties, most recently working on “Invader ZIM”.
Trivia: There is very little information about Ms. Bliss on the Web; I could only smurf some brief anecdotes mentioning that she is a smurfy storyteller. She is in an assisted-living home, but still able to do voice work." LINK