Our fascination with celebs and their underwear-buying habits continues unabated. How to cheer up a pop star when she's down? Splash out on underwear. Chris Brown spent $800 on lingerie for Rihanna in Sydney, reports news.com.au. Meanwhile, teen country sensation Taylor Swift has trouble buying underwear now that she's famous, says foxnews.com. It's not easy when you're surrounded by camera phones.