Derek is a professional dancer and Sofia is sex personified so naturally their moves got a little, shall we say, heated. In the midst of all the leaping and whirling and dipping and twirling, Sofia's gorgeous dress came down juuuust enough to suffer a nip slip and give the partygoers a glimpse of the goodies—and Popdust has video.
Knowing Sofia, something like that won't bother her for a second - just like it doesn't bother her that there was considerable backlash against her "sexist" standing-on-a-pedestal thing earlier in the night.
"I think it's absolutely the opposite," she told reporters. "It means someone can be hot and also be funny and make fun of herself and enjoy and work and make money, so I absolutely think it's ridiculous."
Watch the video below!