Stephanie Mills has revealed an unresolved grievance involving Lady Gaga, accusing the pop star of disrespecting her during a private surprise performance several years ago. The R&B icon shared the story during Wednesday’s episode of “The Jason Lee Show.”

The Grammy-winning “Wiz” star described an encounter that left her with a lasting negative impression of Gaga. Mills did not soften her assessment when host Jason Lee asked about the experience, as reported by Yahoo.

“I feel like Lady Gaga is a culture vulture,” Mills said. She then appeared to hesitate before continuing, saying, “Can I tell you something. ... I don't even know if I should say it now.”

According to Mills, her former manager approached her a few years ago with an unusual request. Gaga was participating in a fashion shoot in New York, and the manager said Mills’ hit “Home” was Gaga’s favorite song.

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Mills said the manager asked, “Would you come and surprise her and sing?” The singer was initially resistant to the idea and questioned why she should make the trip.

“At first I said no,” Mills continued. “Why would I do that? And I was talked into it. Never let somebody talk you into something.”

Mills ultimately agreed and went to New York for the surprise. Her account of Gaga’s response suggested that the performance did not receive the warm or enthusiastic reception she had expected.

“I went,” Mills said. “She had a little black dog there, and all the other people, and so I sang for her. She didn't smile. She didn't do anything. She looked at me like I had two heads.”

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After Mills finished singing “Home,” she and Gaga took photographs together. However, Mills said the situation became even more uncomfortable as she and those accompanying her tried to leave.

Gaga’s team stopped them at the elevator and demanded that the photographs be removed, according to Mills. “And they did not let us leave until they saw every picture being deleted,” she said. “Very disrespectful.”

The Broadway star also explained why she viewed Gaga as a culture vulture. Mills pointed to Gaga having been managed by Troy Carter, a Black manager who also worked with John Legend, Eve, Nelly, Meghan Trainor and Charlie Puth.

Carter is widely credited with helping guide the “Born This Way” singer to superstardom in the aughts. Mills made clear that her admiration for Gaga disappeared after their encounter at the fashion shoot.

“I know who I am. I did it. I sang a song for her. I had admiration for her. I don't any longer,” Mills said.

Mills also reflected on how she now handles moments that anger or disappoint her. Rather than immediately reacting, she said she has learned to remain composed and wait for an opportunity to address what happened.

“I give everybody grace, and I've learned throughout the years to take my temperature down and not react but show them who I am later. ... It's like you don't have to always react, but sooner or later you'll get your chance to say, 'Do you remember?'”

Mills then looked directly into the camera and delivered a message intended for Gaga. “I hope you watch, and I hope you remember what you did. And I feel like you owe me an apology.”

Representatives for Gaga did not immediately respond to The Times’ request for comment. The Times also noted that Gaga, along with many other musicians and actors, has a history of nixing photographs.