ABC's new one-hour comedy, 'GCB' -- starring Kristin Chenoweth and Annie Potts -- has lined up two superstar guest appearances that will surely get people talking.

Singer-song writer Sheryl Crow will guest star as herself in the series' fifth episode, reports TV Guide. "Sheryl is great," 'GCB' creator, Robert Harling, told TV Guide. "She is the guest star at the church fundraiser. It was fantastic working with her. She's a great actress."

Funny lady Sandra Bernhard will also make a guest appearance in the show, but for now, the details are top secret. "It's a big surprise," Harling reveals.

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