Paula Abdul isn’t happy about the addition of fourth judge Kara DioGuardi to American Idol this season.

It’s nothing personal, she says, just business. Paula believes an extra person disrupts the long-established flow of the show.

“Kara and I have known each other for years and we get along great,” Paula reveals March 9 issue of OK! Magazine. “But we tried four judges before and it doesn’t work,” she explained, referring to NYC radio personality Angie Martinez, who joined Idol as a judge in the second season but quit the show during auditions.

“It takes up so much time for each of us to give our opinion that it slows down the pace of the show,” Paula laments.

The “Forever Your Girl” star is cryptic when quizzed about her future on America’s highest-rated TV series.

“It is the last season of my contract, and I have so many other things I want to do.”