We're sure that you hear it all summer long: when you're outside in the sun, you've got to protect your skin by using sunscreen. Not only are the sun's rays really dangerous and harmful to your skin, but you can get some pretty nasty sunburns from too much time spent out exposed to the elements.
Stars like Justin Bieber, Sam Smith, Miley Cyrus, and more have all gotten seriously bad burns that left them lobster-red after their SPF-free days at beaches and pools!
Click through the gallery to see pics of stars who have shown off serious sunburns on social media. Let us know how you avoid getting burnt by commenting below!