Insta-stunner Elsie and her pal, actress Vanessa Dubasso, were starring in a live video on the social media site.
But as Vanessa attempted to record a message to viewers, cheeky Elsie decided to have a little fun.
Pulling her striped vest top down to expose her boob, Elsie smiles at the camera.
Vanessa, laying next to her in a black T-shirt, has no clue about her pals flesh flashing.
But a few seconds later, both realise about the wardrobe mishap and fall about laughing.
The live video has been deleted from Instagram but recently resurfaced by eager fans online.
“Elsie Hewitt is incredible, love how cheeky she is,” one viewer commented online.
Celebrity nip slips, sideboobs & underboobs 
But the American beauty – a rising social media star thanks to the string of racy semi-naked videos she has posted online – isn’t the only babe to have suffered a wardrobe mishap this week.
One woman inadvertently flashed cameras while streaming live on Periscope recently.
While another sent fans into meltdown when her top seriously let her down during a live video chat online.
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