Britney Spears perpetrated a random act of kindness on Wednesday when she handed a wad of cash to a homeless man. After withdrawing money from an ATM, Spears was stopped at a traffic light in LA when her car was approached by a homeless man. "Britney rolled down the window and handed the guy $300," said a source. "She said, 'Good luck and happy new year!' The guy almost had a heart attack... Britney wants to do good - for herself and the world. That's what she's all about."