Can anyone who spends $7 million in a year qualify as a bargain hunter? Sure, especially if your earnings are at least twice that much. Pop star Britney Spears keeps her costs lower than they might otherwise be by shopping the bargain bins at thrifts such as 99 Cents Plus, TMZ reports.

Turns out she's one of several frugal celebrities who, despite their fortunes, maintain saving and spending habits that might make Warren Buffett proud. For example, actress Sarah Michelle Gellar totes her own bag to Whole Foods (NASDAQ:WFM), which offers a minimum $0.05 discount to those who shop with a reusable tote.

The following slide presentation details the habits of Hollywood's richest and most frugal celebrities and offers tips for bulking up your own personal balance sheet. When you're ready to invest some of those savings, check out our newest report, titled "3 Stocks That Will Help You Retire Rich." The research is free -- just click here now to get your copy.