Madonna celebrated her 50th birthday Saturday at a trendy London club Volstead. Awwww I was just in London Yesterday.... Anyway,

"It was a small party," a source confirms. "A private event for her close family and friends. It was low key."

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John Mayer Speaks about Break-Up with Jen

Though John Mayer and Jennifer Aniston were decidedly mum about their romance, the singer is opening up about their breakup.

"There's no lying, there's no cheating, there's no nothing," Mayer told reporters Saturday about his split with Aniston after working out at an Equinox Gym in New York's SoHo neighborhood.

If anything Mayer had only praise for his ex, saying: "Jennifer Aniston is the smartest, most sophisticated person I think I have ever met."

So what went wrong? "People are different, people have different chemistry," said Mayer, who appeared emotional, nervous and sad. "I ended a relationship to be alone, because I don't want to waste somebody's time if something's not right."

Sources confirmed that the duo, whose whirlwind romance began in April, mutually decided to split earlier this week.

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Congratulations Ellen and Portia

Ellen Degeneres and Portia de Rossi became wifey and wifey on Saturday at their home in Los Angeles.

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8 Gold Metals for Michael Phelps

And he is going to be on with Ryan Seacrest Tomorrow Morning!!!!!!