Janet Jackson has been working hard to get in shape for her upcoming tour, a source close to the Jackson family tells ET. She has lost 50 lbs in 5 months, just by training, dieting and eating clean. Jackson's first tour stop is on Sept. 7 in Lafayette, Louisiana. "Her pregnancy and having a healthy baby were her top priority, so when she canceled her last tour, she knew that she would be making it up to all of her fans once she got on the road again," the source shares.