Last week, Beyoncé performed “I Was Here” at the United Nations to celebrate World Humanitarian Day. While we got to see a few photos of her wearing a floor-length sparkly white gown, we didn’t get to see actual footage until yesterday, when she released a video of her performance on her website. You really should watch it for yourself, mainly to see the truly heart-rending shots of U.N. workers feeding children and rescuing flood victims projected dramatically onto a huge screen behind a singing Beyoncé. But it’s also worth paying our respects to Beyoncé’s ass in her dress, which is miraculous in an entirely different way.