The actress, who plays Rachel Berry in the Fox musical comedy, confirmed that she will be performing a cover by Barbra Streisand when the show returns on September 13.
"I'm doing [a Barbra song] in episode one," she told Perez Hilton at Comic-Con. "Well, it's Barbra covering a popular song, I will tell you that. As far as Barbra's songs are concerned, I really do feel like I've done my faves."
Michele added that she has now been "bugging" showrunner Ryan Murphy to give her songs by another of her musical idols, Celine Dion.
On how Rachel will cope at NYADA in Glee's new season, Michele teased: "She's gonna be alone when we first see her... I think it's going to be really interesting seeing her in this place.
"She's always been surrounded by her friends in an environment that she knows and now she's by herself with people she doesn't know in a school full of 800 other Rachel Berrys.
"I think that's going to be challenging for her. But I think she always works best when she has to fight her way to the top."
Photo gallery - Comic-Con 2012 stars: