EW: Ryan Seacrest has lined up his next Fox hosting gig. With “American Idol” set to have its final season next year, Seacrest will host a new summer series titled “Knock Knock Live,” from “Idol” producer Simon Fuller. The premise: Each week, Seacrest’s team shows up on the front door of an unsuspecting person offering a chance to win a big cash prize, meet their favorite celebrities and “turn their dreams into reality.” Examples include a person’s favorite professional basketball player who challenges them to a game in their driveway, or a major pop star in the world performing a concert on their front lawn.