"It started out as a goof. Now it's becoming a job," Stern, 59, said to his listeners. "I am very excited to be going back to America's Got Talent. I will go back [for] one more season."
Stern -- who has costarred alongside Howie Mandel, Sharon Osbourne, Melanie "Mel B" Brown, Heidi Klum plus host Nick Cannon on the NBC series -- may be coming back to the reality competition for its ninth season, but admits that the decision didn't come easy.
"I really, really did struggle with this decision because I've been working a long time. I really wanted to decide if this was going to take away too much free time," he said. "Did I really still enjoy doing it? Did I have something to say? Is it something I should be involved with still?"
He joked: "I decided I needed a personal life, but that big black hole in me that demands attention -- it won."
Stern first joined the series when he replaced Piers Morgan during its seventh season in 2012.