Singer Britney Spears has reportedly put her husband Kevin Federline on a strict financial budget, because his spending habits are out of control. The TOXIC singer, who is currently spending time with her family in Maui, Hawaii, put her husband on a restricted budget to force him to be financially responsible. A source tells gossip website, "Each month he will be allotted a certain amount of money for personal use - i.e. clothing, nightclubs, booze and day-to-day activities. "Any big items - cars, or trips that go over allowance - need to be approved by Britney herself. "She acknowledges she has made a great deal of money, however, she is trying to show Kevin that he needs to be responsible and curb his out-of-control spending habits."