Drama-plagued Britney Spears seems to be causing more waves in her bank account, than in personal life.

The singer has endured a child custody battle, a personal meltdown, paparazzi frenzies and a psych ward stint among others, leaving her family struggling to protect the millions of dollars Spears has scooped up over a decade of hit pop music, endorsements and merchandise.

Although it's impossible to know how much Britney is worth, published estimates of her net worth have varied wildly, up to $125 million. But one of her former financial advisers estimated her current fortune at around $50 million, according to the New York Times.

As part of her divorce from ex-husband, Kevin Federline, part of her income statement surfaced, dropping a hint of just how much the pop star is worth. It put her average monthly earnings at more than $730,000, mainly from royalties, but said she earned only $13,000 a month from investments.

But she's also spending a lot of that income. Her spending includes $102,000 a month for entertainment, gifts and vacation and another $16,000 for clothes. Yet court documents reveal that members of Britney's household have been paying for her medicine, food, and other day-to-day needs.

During her career peak, Spears earned well over $12 million for endorsing companies like Toyota, Nabisco, Kirin beer, Sketchers, Clairol and McDonald's; $9 million was from Pepsi alone. And Spears still gets at least $2 million to $3 million a year from a perfume deal she signed with Elizabeth Arden in 2004. The perfume lines experiences a particularly high demand from Dubai.

Because we're so incredibly fickle as a society, the perfect entertainment is someone who's in the bottomless pit and rising again, an insider told the Times.

If she's together, fit, beautiful and on her game, it'll be just printing money.

In real estate, Britney has also been successful, raking in over $4 million in profit. She sold her house in Malibu last summer for $10 million after paying $6.9 million for it in 2004, and she unloaded her Lower Manhattan condominium for $4 million in 2006, after buying it for $3 million in 2002.

She put another property in a gated hilltop community near Mulholland Drive went on sale a year ago at an asking price of $7.5 million -a bit more than the $7.2 million she paid for it.