IB tease: Dr. Luke

IS THERE A DOCTOR IN THE HOUSE? We know that the next season of American Idol, which begins in January, will be without Jimmy Iovine, the show’s chief mentor the last three seasons, as well as Dr. Luke, who had to back out of a judging job he’d initially accepted. Now, notes I.B. Bad in his latest, just-posted column, grumblings are said to be coming out of Dr. Luke’s camp about that $27 million decision. Dr. Luke co-wrote and produced several tracks on Katy Perry’s Prism for Capitol, including the massive lead single “Roar.”