The 'Glee' actress - who plays Sue Sylvester in the FOX musical drama - joked that she had convinced the controversial politician to appear as a guest star in the series, singing an "original tune" written by the star.
She said: "Though not firm as of yet, we are pretty sure we got Sarah Palin to do a guest spot on 'Glee'. She'll be singing an original tune that I penned. It's called, 'Look at Me, I'm Bats**t Crazy'."
"I feel pretty good about these changes."
Speaking at the Wall Street Journal's D: All Things Digital conference, she said: "I'm launching a Fox News investigation into the young and fresh-faced cast of 'Glee'. I have some inside information and I don't believe any one of them are real Americans."