However, fans quickly voiced their concern for the star's health, branding her thin legs "alarming" and "unhealthy".
After a barrage of comments, Chung responded directly, writing: "Ok everyone thanks for the teen angst discussions. People are different sizes. I'm not trying to be thinspo for anyone (sic)."
Deciding to completely delete the picture, she added: 'I am now making this acct private. Byyyyyeeee."
The 28-year-old has previously spoken out to defend her weight, telling OK magazine: "I don't expect everyone to like me, but I cannot express how frustrating it is not to be believed when you say, 'I don't have an eating disorder'.
"It angers me because I don't want to be a pinup for young girls just for being thin. I don't want to be admired for being thin, as opposed to being dressed well, and I don't want the two to get confused."
> Alexa Chung: 'I have secret boobs'