However, the 31-year-old model handled this awkward situation in the most hilarious way possible as she posted a video apologising for having nipples and shut down the shamers who were making a huge deal out of the boo boo.
Unfortunately for Legend, his wife Chrissy Teigen revelled in his cluelessness about the sport and - in true Teigen fashion - ripped him for it on social media. Deepika Padukone nip slip wardrobe malfunction pic from xXx: Return of Xander Cage premiere is FAKE!
Chrissy took to Twitter today to comment on the accidental flash and her reaction was priceless.
Teigen was then asked to describe her biggest fear.
Although she clearly has no issues stripping off and flashing the flesh, the "Lip Sync Battle" star recently admitted she has cried to John, 38, in the past because she is so unhappy with her appearance.
One commented: "WTH, all I saw was nipple in your spray tan snap... idk if that's what you meant to do, but I just thought I'd let you know".
"I'm dying. No one in the world knows less about baseball than these two", Teigen wrote on another photo of Legend and his friend Mike Rosenthal (husband of celebrity hairstylist Jen Atkin).
"It's not something I'm proud of".
But her latest post might just be our favourite yet.
She said: "I'm in a weird phase where I'm jealous of those bodies".