The actress, 28, shared a picture on Instagram wearing tiny white shorts, a pink top, and a black waist trainer.
"Love my waist trainer from @nowaistclique," she wrote.
The redhead originally shared a version of the photo on Twitter, but quickly deleted it after fans accused her of Photoshopping the snap.
Lohan, who is no stranger to editing fails, later posted the un-edited version - which still shows off a very tiny waist.
Kim Kardashian West, Khloe Kardashian, Kourtney Kardashian and Kim Zolciak Biermann all swear by their corsets.