Barbra Streisand is so insecure about one side of her face that she canceled an appearance on "Jimmy Kimmel Live" because of it, the comedian claims.

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"If a guest wants you to swap around your set so the camera gets their best side, do you refuse? I've had to switch seats for Mariah Carey four times," Andy Cohen asked Kimmel on "Watch What Happens Live" this week.

Kimmel quipped, "I've had a guest ask for that and I said no."

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Cohen asked, "Really? Was it Streisand?"

"Yes," he replied succinctly, adding, "It was the condition. The condition was that we couldn't talk about that we'd switched around [our seats], and I was like, 'I don't see how that would work.'"

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Streisand previously made Jimmy Fallon switch seats with her and took the driver's seat in James Corden's "Carpool Karaoke" in order to showcase her favorite side of her face, The Sun reported.