Yikes!

When Martha Stewart made an appearance on Wendy Williams’ talk show, the host touched on a sensitive subject — by bringing up her guest's age!

“You're a very beautiful woman…and I find it surprising that you're in your 70s,” Wendy, 51, said.

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Wendy Williams. (Photo Credit: Getty Images)

The author/businesswoman responded to Wendy’s flub, saying, "You don't have to promote that…I never say how old I am. I don't feel my age. And I don't look my age. And I don't want to be my age. And you should not say my age."

You go, Martha!

This isn't the first time Wendy caused a stir with a star by putting her foot in her mouth!

Click through our gallery for more of Wendy's most controversial moments with celebrities.