Billie Eilish is calling out people who wear clothing and accessories made from mink fur.
In a series of Instagram stories that have now apparently been deleted, Eilish first posted a picture of the animal, writing: "Just so you know...this is a mink. You bitches getting mink lashes and mink slippers disgust me lol."
In a second post, she wrote to her 40 million followers: "Where yo heart at?"
Eilish's message comes off the back of a recent viral tweet that condemned making coats from mink fur.
That's what yall be making coats out of? Yall mfs evil af lol https://t.co/qZxB250d9z
The tweet has racked up more than 150,000 likes in the last couple of days.
But it's mink eyelashes that have become increasingly popular. According to a report published by Glamour, the lashes are often preferred because they're "fluffy" and "virtually weightless" which makes them more comfortable to wear.
However, Peta has since challenged the notion that mink eyelashes are "cruelty-free", claiming instead that the animals are housed in "highly unsanitary conditions" on fur farms.
Eilish herself has spoken out in defence of animals in the past. Back in June, the vegan singer took to social media, calling out animal cruelty in the meat and dairy industries.
