Pop superstar Janet Jackson has reportedly been ordered to lose weight immediately – or face being dumped by her record label. The singer’s career took a nose dive when her infamous wardrobe malfunction at 2004’s Super Bowl saw her last album Damita Jo flop, and sources close to Jackson allege she has since been seeking comfort in food. Record label Virgin are so concerned about her extra pounds, they have reportedly hired a personal trainer ahead of promotion for her latest album. A source tells PageSix.com: “Janet had a really bad year. This new album is supposed to be pretty good, but Virgin feels it can’t market it without Janet being back in fighting form, so they have hired her a personal trainer and put her on a diet. “She has to lose at least 20 pounds.” But a pal insists there’s nothing to worry about: “Janet always gains weight when she’s not working – and always loses it in time to promote her albums. Janet always takes care of it when it matters.”