Court papers in Britney Spears' custody dispute with Kevin Federline show the pop singer spends lavishly on clothes and entertainment, and does not save or invest any of her roughly $737,000 monthly income.

Spears' monthly expenses include $49,267 in mortgage for two houses, $16,000 for clothes and $102,000 on entertainment, gifts and vacation, according to her financial declaration in the court papers released Thursday.

Although she is often photographed eating fast food, Spears declares she spends about $4,758 per month dining out. Meanwhile, she spends zero on education, savings and investments and gives $500 a month in charitable contributions, the documents said.

She has to pay her ex-husband $15,000 per month in child support and $20,000 in spousal support. Spousal support will end Nov. 15.

As for Federline, his biggest monthly expenses include $7,500 in rent and $6,000 in security, according to his financial declaration.

The dancer-turned-rapper has a comparably modest monthly budget for clothes — just $2,000. He also spends about $5,000 on entertainment, gifts and vacation, and $1,500 eating out.

Federline earned more than $500,000 in 2006, mainly from entertainment and endorsement deals, but grossed only $7,436 that year.

After-hour calls to attorneys representing Spears and Federline were not immediately returned.

The documents also show Spears had to temporarily surrender custody of her sons to Federline because she defied a court order.

In a Sept. 28 order, Superior Court Commissioner Scott M. Gordon prohibited the divorced couple from driving their children unless they are properly insured and have a valid driver's license.

The pop star disobeyed the order when she was photographed driving Sean Preston, 2, and Jayden James, 1, a few days after the Sept. 28 order.

She was ordered Oct. 2 to relinquish her children "until further order of the court" when she wasn't able to prove compliance with Gordon's order, namely proof of a valid California driver's license.

The two previously had joint custody of their sons, and Federline was seeking a greater share of custody. After he got temporary custody, Spears went to a motor vehicles department office and got a temporary driver's license.