Britney Spears -- I Spent $7 Mil Last Year, But I'm Still A Bargain Shopper

Britney Spears made a fortune last year -- way more than $10 million -- but she's still a hardcore bargain shopper ... this according to new legal docs obtained by TMZ.

According to documents, Britney's conservatorship raked in nearly $14 mil in 2012. But here's the thing ... she spent $6.8 mil, which sounds like a lot, but a closer look makes Brit look like a bargain hunter.

-- $63.74 at a 99 Cents Plus
-- $11.92 at Pay 99 Cents Or Less
-- A tab from Subway, Wetzel's Pretzels, Domino's, IHOP, 7-11, El Pollo Loco, McDonalds, In-N-Out, Coffee Bean, Starbucks, and Romano's Macaroni Grill.
-- $33,959 on grooming and wardrobe -- bargain basement for a big star.

But there are extravagances as well ... like a $500 manicure. And get this -- $3,400 on XMAS lights.

Our favorite -- Britney paid $1,500 to her Kentwood, Louisiana yard boy -- aka, Jamie Lynn's baby daddy Casey Aldridge.

As For Britney's total worth ... it's a lot. The conservatorship alone now has $36.4 million. And that doesn't include a huge chunk of her net worth ... including the $68 mil she made on her last concert tour and the $15 mil she snagged from "X Factor."