Beyoncé's mum has criticised "sad little haters" who suggested the star lightened her skin for the premiere of her Renaissance film.
The singer went for a platinum blonde hair look and wore a silver dress at the red carpet event on Saturday.
Some criticised Beyoncé on social media for changing her appearance and said she "looks so white".
In a long Instagram post, Tina Knowles defended her daughter and said the comments were racist.
She also said people accusing Beyoncé of lightening her skin were "stupid", "ignorant" and "self-hating".
"She does a film, called the Renaissance, where the whole theme is silver with silver hair, a silver carpet, and suggested silver attire and you bozos decide that she's trying to be a white woman and is bleaching her skin?" she wrote.
Tina's comments were posted alongside a video montage of Beyoncé - including a photo from the premiere - over the top of her song Brown Skin Girl.
Beyoncé released the track in 2019 as part of the film soundtrack for The Lion King: The Gift.
It champions blackness and includes her daughter Blue Ivy singing lyrics like "Brown skin girl/ Your skin just like pearls/ The best thing in the world".
In a documentary about the creation of the film, Beyoncé spoke about the personal significance of the words.
"When I see fathers singing Brown Skin Girl to their daughters, to know that my daughter can have the same opportunities and feel confident and feel like she doesn't have to take her braids down and she can comb her afro out and she can glisten in her brown skin... that is why I make music," she said.