New York, January 13: Singer-actress Jennifer Lopez and her husband Marc Anthony's decision to speak and sing, respectively, at the Latino Inaugural Ball in DC on January 18 has earned them the accusation that they are trying to win the confidence of President-elect Barack Obama, after declining to support him during his campaign days.

Some Latino supporters of Obama are furious that the wealthy couple didn''''t support the Democratic nominee until he was elected US President.

One power player called them "vile opportunists for worming themselves into anything Obama related even though they had nothing to do with his win."

The source revealed that Anthony had refused to perform for Obama during a crucial get-out-the-Latino-vote event in Orlando, Florida, two weeks before the election.

Even Lopez had refused to endorse Obama unless he called her himself, according to the source, who added that the President-elect never contacted her.

The Orlando event went on without them and featured Bill Clinton and Jimmy Smits, said the source.

Some people are said to be upset that Lopez and Anthony did not donate to support Obama's campaign, and likened them to Sean Combs, whose reps tried to procure inauguration tickets for him for free.

"They haven't given him, his campaign or the inauguration a cent," a source said.

A friend of Lopez and Anthony, however, said: "Unlike Puffy, they are doing something - they are performing. And lots of people, including Rihanna and Mariah Carey, are performing and didn''''t donate. A lot of celebrities are showing up as guests of magazines or political people and not paying anything or doing anything. Marc and Jennifer shouldn''''t be reviled for that."

The Latino Ball will take place at Union Station.

It is expected to attract a list of boldface names, including Rosario Dawson, Wilmer Valderrama and "Ugly Betty" actor Tony Plana. (ANI)