Sao Paulo state Gov. Jose Serra is considered a likely entrant in the 2010 campaign to succeed Brazilian President Luiz Inacio Lula da Silva.
On Wednesday, Madonna posed for photographers as Serra wrapped an arm around her.
The singer didn't respond to questions about their meeting. Serra said Madonna expressed a desire to help needy young Brazilians after she toured a Sao Paulo center that helps kids.
Serra seemed most impressed by the 52-year-old Madonna's youthfulness. "She seems very young, much less than her (age)."
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