Fans can't be blamed for thinking this was already common knowledge, but in fact, the departure of Kara DioGuardi from 'American Idol' has been merely a presumption all summer -- until now. On the Friday evening before Labor Day, Fox quietly issued a press release confirming what everyone has suspected for weeks: the 39-year-old singer-songwriter-producer will not return as a judge on 'Idol.'

According to EW.com, Fox's announcement included this statement from DioGuardi: "I felt like I won the lottery when I joined 'American Idol' two years ago, but I feel like now is the best time to leave 'Idol'....It has truly been an amazing experience. I am grateful to FOX, FremantleMedia and 19 Entertainment, as well as the cast, crew and contestants, for all they have given to me. I look forward to my next challenge, and want to thank everyone who has supported me. All the best to everyone on Season 10!"