Pop queen Janet Jackson has undergone a punishing fitness regime in a bid to regain her svelte physique. The singer deliberately piled on the pounds for a possible movie role, according to her boyfriend Jermaine Dupre.

But Jackson is fed up of her flab and, while she insists she isn't under contract to lose weight, she couldn't wait to get slim in time to promote new album 20 Years Old. Dupre says, "She was gaining weight for a potential movie."

A spokesperson for Jackson says, "It is not a requirement of her contract to lose weight."

(This news article provided by World Entertainment News Network)