Tubby hubby Kevin Federlin

Britney Spears has put husband Kevin Federline on a diet.The 'Toxic' singer has devised a healthy eating plan for her tubby hubby after he piled on the pounds during her second pregnancy, with son Jayden James, to make her feel better about her body shape.Although Britney has shed her baby weight with a gruelling exercise regime and a healthy diet, Kevin admits he has struggled to get back down to his regular size.He told People magazine: "I gain the sympathy weight and she loses it in two weeks after she has the baby. It is daddy fat. It comes and goes, but sometimes she'll tell me to get my butt in the gym."Britney went on a strict diet and dance regime to shift her baby weight after delivering Jayden by Caesarean section on September 12.Last week, Britney - who has an older son, Sean Preston - celebrated slimming down to a size 6 by spending $10,000 on new clothes.The 24-year-old mother-of-two went to Barneys, in Beverly Hills, where she blew thousands of dollars on a new wardrobe.

A source at the store said: "She didn't buy any tracksuits but she did get some soft clingy sweaters."