Cher is terrified to guest judge "Dancing With The Stars" . In fact, the superstar doesn't even think she's qualified to be judging the show, even though her son Chaz Bono was a contestant on Season 13, her aunt and uncle were both ballroom dancers, and -- let's be real -- she's freakin' Cher.

"I don't know anything about ballroom dancing," she admitted on a conference call on Friday. "I don't want to be responsible for someone getting a different mark than a professional would give them. I like to know what I'm doing and do it really well. In this instance I have no idea what I'm doing."

Instead, Cher said she hopes she'll be called upon to comment on the entire dances, not the technical aspects of routines. The pop icon said she's been relying heavily on Chaz for his guidance. "He's coming over tonight to give me tips," she said. "He said, 'Mom, you don't understand how seriously people take this. I'm going to tutor you.' Obviously I need all the help I can get."

For a woman who seems absolutely fearless, Cher also admitted that she's not interested in ever competing on the show: "I would be too frightened!" Instead, she's content in cheering from the sidelines as a judge (with three different outfit changes in store). "This show is about overcoming your fear and going to a place you've never gone before. It takes sheer guts."

According to Cher, not even decades of touring and performing have prepared her to judge the show. "We don't grade in rock and roll."

"Dancing With the Stars" airs Mondays, 8 p.m. ET on ABC.

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