It seems that this great butt shot is a fake.
She did a photoshoot for Women’s Wear Daily in that outfit and others. This one seems to be suspect, because all of the ones from the published photoshoot show her wearing sheer leggings, which are missing in the alleged fake. One commenter knew that this pic is from an AI-generated video, which was in turn inspired by the legitimate photoshoot.

I don’t know about that exact shot but Phun does have gifs of her wearing that outfit in their Celeb Extra section.
Yeah this is from an AI video based on the photoshoot, but there are more photos available
I don’t know this AI stuff has moved at a crazy pace. One thing I have noticed from all the other shots I’ve found for this that the other shots appear to have some sheer leggings which this one does not which is suspect. Pretty good job either way lol.
I can’t believe lauded journalist Drunken Stepfather would have posted this without checking sources.
It’s Fake? BOO!!!!!!