Disney Channel star Demi Lovato has revealed her strict rule her future children have to follow that ensures they “have a childhood”. At the age of 15, Demi Lovato rose to fame in 2008, appearing as the lead character of the Disney movie, Camp Rock. She became an instant hit with the Channel and their viewers, and went on to be one of their most successful child actors. But, over the years the celebrity has faced a lot of public backlash due to her drug use and rehab stints, which the star has previously expressed stemmed from the pressures and tough situations that she was put under as a chil…