Disney’s High School Musical had better watch out because Corbin Bleu’s Disney Channel Movie has knocked it off it’s spot at the top of the Disney Channel Ratings chart. Jump In! drew 8.17 million viewers making it the most-watched program in the network’s history. This surpassing the premiere numbers for last year’s Cheetah Girls 2 (8.12 million) and High School Musical (7.76 million). Not satisfied with that, Jump In! also drew three of the top seven spots in the Neilsen Cable Ratings chart for last week.