US TV
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The reality TV star claimed she is excited about teaming up with DioGuardi, but confessed she is worried about the public's reaction.
"I am concerned about the audience and acceptance," she told US radio. "Time will tell. We'll see."
Explaining the addition, Abdul commented: "They always tried for a fourth judge because it followed the format of the original show, Pop Idol.
"We haven't had much luck with that working, but we're gonna give it another try."
Kara DioGuardi's songwriting credits include tracks for Celine Dion, Pink, Gwen Stefani, Britney Spears, Miley Cyrus and Jessica Simpson.
The eighth season of American Idol airs in January.
Tube Talk
'Vampire Diaries', 'House' Tube Talk Q&ATube Talk answers your questions about all things television in this week's Q&A.
2012-13 Season
Sophia Bush joins CBS pilot 'Partners'Sophia Bush will star in a new pilot from the creators of Will & Grace.
US TV Interviews
Debby Ryan talks Disney's 'Jessie'The Suite Life's Debby Ryan stars in new Disney Channel comedy Jessie.
US TV Ratings
'Cougar Town' returns to ABC with 4.8mAll five major networks were down on Valentine's Day, with ABC suffering the most.
