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Talk about an epic fail.

Nicole Richie appeared on “Talk Stoop with Cat Greenleaf” on Sunday to discuss her new scripted show “Great News” when she was asked about the greatest news she’s heard all week.The 35-year-old actress responded sarcastically that it’s supposed to rain three times this week in Los Angeles when the 45-year-old host went to high-five “The Simple Life” alum.

NICOLE RICHIE IS 'NOT GOING TO APOLOGIZE' FOR 'WILD' BEHAVIOR

However, Greenleaf missed and instead accidentally slapped Richie in the face, prompting her Ray-Ban aviator sunglasses to fly off her head and land several feet away.

“Omigod!” screamed Greenleaf, who covered her mouth and appeared mortified by the unscripted incident. When asked if she was all right, Richie quickly recovered and posed with her hand behind her head, smiling.

“That was the craziest high-five of all time,” said Greenleaf. “I’m sorry. I’m notoriously clumsy!”

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“I can see that,” joked Richie. “Out of my left eye only.”

Richie continued to make fun of the incident and even remarked at one point that she was “just abused like two seconds ago.”

The star concluded the interview by discussing the upcoming comedy and answering rapid-fire questions about her favorite things.