While most people would do everything they could to conceal a blemish for a special occasion, fans loved that Chung was embracing it, leaving comments like "What a babe!', "High five" and "love it, love her". (Post continues after gallery.)
Alexa Chung on Instagram
In a world of Instagram "perfection" that only gets ramped up during Fashion Week, Chung's selfie is a refreshing change and it's that honesty online that she's really passionate about.
"No one is as happy as they seem on Instagram. Even friends of mine. I'll say, 'Wow, that looked amazing!' and they'll be like, 'Nah, it wasn't.' I tell them, 'You need to stop putting that stuff up because it looks perfect'. But then Instagram would be awful if it was reality, wouldn't it? 'Here are my spaghetti hoops and me crying over EastEnders'," she told The Telegraph earlier this year.
From acne-ridden women everywhere, thank you Alexa.
Do you like it when celebrities go 'natural' on social media?