Tomorrow, Lil Jon's new memoir I Only Shout So You Can Hear Me hits the shelves. Written with literary and media critic Paul Cantor, the book reveals the rapper's recent discovery that the man who raised him wasn't his biological father. He discussed the topic in a new interview with People .

The hip hop star born Jonathan Smith was raised by his mother Carrie and Willie, who he thought was his biological father. He was raised with two biological brothers, Willie Junior and Chris, as well as adopted siblings Mario and Sheena. In the early 2000s, Willie passed away from bone marrow cancer. "He didn't really see me become a star," Lil John says. As for his mother: "She was just so happy because I was the firstborn, so I was the baby," he says. In 2013, she died after having a stroke as a result of complications from diabetes.

When a cousin took a DNA test to learn more about their family, Jon found out Willie was not his biological father. "He shared his map with me," he says of his cousin.…