She's referring to Claire Danes, who rocked a Cinderella-inspired dress for the Manus x Machina: Fashion In An Age Of Technology event in 2016. She looked STUNNING too:
In a second comment, Lindsay then threw some shade, saying, "I don't know why someone thinks that they can be more chic. Ever."
The shade...
WOW.
I love drama, but Lindsay, they look different and both completely knocked it out of the park.
Zendaya has yet to reply, but I'll be ready to update y'all if she does!