A source close to the Jackson family now tells ET that Janet Jackson is planning to tour with her almost four-month old son, Eissa. According to the source, Jackson is preparing for this to be "her greatest tour ever." "She'll be coming out full force and unrestricted," the source says. "Janet will begin rigorously dieting. She wants to look her best for herself and her fans." Earlier this week Janet Jackson announced she was headed back out on tour after the birth of her first child.