One of the downsides to Britney Spears' custody battle is the obvious mental and emotional turmoil it puts her through, but one of the upsides is that we get to see exactly what Britney Spears spends her money on, so really it all evens out.

Thanks to court papers released yesterday, the world at large can now see exactly where Britney Spears' money goes. While it's no surprise that Britney Spears earns more in a month than Kevin Federline does in a year, it might come as a bit more of a shock to see that Britney Spears carefully budgets for everything. For example, Britney Spears has mortgages and charitable obligations, which is why she only spends $102,000 a month on 'entertainment, gifts and vacations.' If only everyone had the financial prudence of Britney Spears, surely the world would be a far better place.

We all know that Britney Spears is loaded – even when she'd seemingly given up on music to dedicate her life to stumbling out of nightclubs with her vagina flapping about in case another accidental baby suddenly decided to fall out, Britney Spears was still pulling in $737,868 a month through sales of her music and perfumes – but nobody knew what she did with it all. 

But now we know, and it's all thanks to Britney Spears being legally deemed as too unfit to care for her own children! As part of Britney Spears' ongoing custody battle with Kevin Federline, details of both their earnings and expenditure had to be submitted to the court. And now that the court is done with those details, it's time for the rest of the world to have a gander.

So what does Britney Spears spend her cash on? Well, there's the $500 she gives to charity, the $49,267 she uses to pay for the mortgage on her two houses, her $16,000 monthly clothes bill, the $15,000 in child support she pays to Kevin Federline and the $20,000 spousal support. And then there's the slightly less specific $102,000 Britney Spears blows each month on entertainment, gifts and vacations. And the zero dollars she spends on education, even though she could have given 20p to a Special Brew-addled tramp and he'd have taught her how to mime to own song more convincingly than she managed at the MTV VMAs.

Compare that to Kevin Federline, though. He has less than two weeks left of spousal support, after which he'll have to fend for himself. That shouldn't be too hard – last year Kevin Federline managed to earn $500,000 in total. However, shave off the $7,500 he pays in rent monthly, the $6,000 he pays in security, the $2,000 he spends on clothes, the $5,000 he spends on entertainment, gifts and vacations and the $1,500 he spends eating out and he only came out of last year with a profit of $7,436.

What's that? You want to know what royalties Kevin Federline earnt from sales of his high-profile single release PopoZao? $3,300 which, to put it comparatively, is what Britney Spears spends on Taco Bell and Starbucks every three weeks.

Some analysts are concerned that Britney Spears doesn't put any of her earnings into savings or investments for the future, even though she must be as aware of fame's fickle nature as anyone else, but they really needn't worry. You see, judging by Gimme More, Britney Spears saves all kinds money by refusing to spend more than $2.27 on her music videos.