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Sunday July 20, 2008

A radiant-looking Britney Spears made a surprise appearance at a fundraiser for Jenny McCarthy’s autism charity Generation Rescue in Los Angeles Saturday.

As guests Jim Carrey, Charlie Sheen and wife Brooke Mueller made the rounds, Spears, 26, sipped on red wine.

Carrey’s daughter Jane later took to the stage to belt out a few Frank Sinatra and Jackson 5 tunes.

Britney was “looking happy,” an eyewitness says. “She looked incredible – like the Britney we used to know. She was clapping and smiling a lot.”

It was Spears’ first public outing since reaching a custody agreement with ex-husband Kevin Federline last week.

While Federline gets sole custody, Spears gets three visits a week from Sean Preston, 2, and Jayden James, 1, including two overnights.

If all goes well, she could have her boys roughly 40 percent of the time, her attorney, Laura Wasser, has said.

Wasser told the Associated Press the “difference” in Spears “from the beginning of this year to now is astonishing.”

Meanwhile, the ‘Toxic’ hitmaker — who is set to appear with Madonna on her Sticky and Sweet tour later this year — is due to spend the summer recording her new album, Spears’ manager, Larry Rudolph, confirmed.