'Oprah's Big Give' contestant Brandi hands out roses.

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With only a couple of hours left, Brandi meets a rose vendor on the street. She buys almost $2,000 worth of flowers and hands them out to people in passing cars. She even recruits a stranger to help out!

"Even if I just did this, it would be worth it all," Brandi says. "That was the best time of my life. I brightened so many people's days."