Kara DioGuardi exits "American Idol"

Fox made Kara DioGuardi's departure from " American Idol" official as the rumor mill continued to heat up over the arrival of Jennifer Lopez as a judge. DioGuardi was a judge in the series' eighth and ninth seasons.

In a statement issued by Fox, DioGuardi said, "I feel like now is the best time to leave 'Idol.' ... I look forward to my next challenge."

The executives associated with the show did not give a reason for DioGuardi's exit.

"Idol" creator and executive producer Simon Fuller gave a cryptic quote suggesting their relationship is not finished. "I will miss having her on the show, but I look forward to working with her in music for many years to come," he said.

Meanwhile, TMZ.com reported that a deal with Lopez is expected to be wrapped up within days of the Labor Day weekend.