Recently in Las Vegas, Michael Jackson was spotted at a Siegfried and Roy show with three kids. In addition to son Prince Michael, 5, and daughter Paris, 4, the pop star had an infant boy he called his "third child," People reports. Confusingly, he referred to the child as Prince Michael II. Is Jackson's ex-wife Debbie Rowe the baby's mama? "Anything's possible," a source told the mag. "They still have a relationship."