"The Simpsons" and singer Lady Gaga have collaborated to create a TV episode of "The Simpsons" that features the pop star.

25-year-old controversial singer Lady Gaga, who once revealed she smokes marijuana while making her music, has revealed that she did a voice-over for an animated version of herself in the popular cartoon comedy series "The Simpsons".

"This is extraordinary! I''m stunned that she has time in her schedule that she's coming to our studio to record. She's playing herself, and the writers describe her as the happiest, most optimistic person in the world. She comes to Springfield to try to cheer up Lisa, but she can't," said Yeardley Smith, who voices Lisa.

Gaga loved the job: "I make music, but I don''t do voice-overs every day of the week, and their characters are so awesomely convincing and sincere and wild and funny, I had to remind myself constantly of the sincerity of the humor. That's what I was trying to focus on, not putting on a character too much and really being as sincere as I could with the lines.

"I would say this is one of the coolest things I've ever done. My dad's probably going to do 80 backflips when the episode comes out."
 
The episode is called 'Lisa Goes Gaga' and will air next spring.