That is what happened to Selena Gomez when she attended the 2018 Met Gala. It was so bad, people were actually accusing her of blackface.
Now, Selena has had a bit of time to let the whole thing die down, and to obviously scrub her body silly so she has gone back to her normal colour.
And although she made a joke of her tan on Instagram the day after the Met, she's still letting her fans know how much regret she has for that look.
While meeting fans at the Puma Defy City event, fans told her how beautiful she looked.
“Thank you so much. I fixed it from Met Gala,” she said back as she gestured to her skin.
At least she knows how to laugh at herself.