US pop star Madonna broke into tears when Brazilian billionaire Eike Batista announced that he would donate $7 million for her welfare projects, a media report said. During a dinner at Batista's home Thursday, the tycoon asked the singer how much money she collected and how much more she needed. When she answered that she had $3 million and needed to raise $10 million, the billionaire announced his readiness to complete the sum. The singer left Brazil Friday after a five-day visit seeking investments for a number of social projects that she wants to launch. On Thursday before the dinner, the artist made a quick trip to Sao Paulo to meet a group of poor women. The mayor said that the singer had accepted his offer for her to perform at the next New Year's festival, for which some two million people would gather on the Copacabana beach.