Howie Mandel reveals the biggest mistake rising stars make with their money "America's Got Talent" judge Howie Mandel shares a warning for rising stars about the biggest mistake they can make with their money. NEW You can now listen to Fox News articles! Howie Mandel shared a blunt warning about the temptations of early financial success for up-and-coming entertainers.  Though Mandel's entertainment career spans more than four decades, the 70-year-old comedian has previously revealed that much