Britney Spears has had it with the spend-happy ways of her hubby, Kevin Federline - nicknamed Kevin "Spenderline." Insiders said Spears has put Federline, a wannabe rap star, on a budget. "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 Brit herself," said one source. "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."

Meanwhile, a source at the Four Seasons Hotel in Maui told us the two are still not getting along: "I was in the elevator with Britney, and she was screaming at K-Fed on her cellphone that she had waited in the suite all day for him to call and had been trying to reach him and couldn't sit in there any longer." A rep for Spears didn't return calls.