The actress appeared in two episodes of the first season as April Rhodes and the show's creator Ryan Murphy has already confirmed that she will also star in future editions.
Chenoweth has now told E! Online that she is anxious about what April will do next.
"I'm going back in two weeks to do Glee," she said. "I did hear April will be stripping and it made me nervous - made me not want to eat."
Chenoweth also revealed that she has decided not to prepare any pole-dancing moves, saying: "I'm not going to practise it because I don't think April would know how!"
The new season of Glee begins tonight at 8/7c on Fox.