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Jenny McCarthy is Singled Out yet again.

Four months after the Love, Lust & Faking It author began dating professional bodybuilder Jason Toohey, a rep for McCarthy announced the couple has broken up.

"They remain good friends," the rep confirms to

McCarthy showed no signs of a broken heart on Saturday, when an eyewitness saw the 38-year-old actress dancing the night away at Hollywood producer Jennifer Klein's holiday party, sponsored by Grey Goose.

When one of McCarthy's pals asked if she had time to catch up, McCarthy said, "'I need a night out. I'll be here for the night for sure! I want to party!'" the onlooker tells Us. "And she did! She danced all night."

This isn't the first breakup McCarthy endured in 2010: the former Playboy model ended her five-year relationship with comic Jim Carrey in April.