Kim Kardashian is probably one of the few women in the world who can get paid $500K just to play to role as a rich man's "date" for the night and walk around holding his arm taking pictures with him for a few hours.  She was invited and ultimately paid half-a-million to attend the Vienna Ball as Austrian businessman Richard Lugner's date, and Kim arrived and played her role as planned until some man decided to act out by disrespecting her husband, Kanye West.  

Apparently, a man working the fancy ball approached Kim wearing Black Face and pretending to be Kanye.  According to TMZ, Kim wasn't having any of the games and immediately walked away from the man.  Shortly after the Black Face incident, Kim was asked to dance by another man which she denied because she said she wasn't a good dancer, however the man tried to be slick and dropped an ill-advised line at her that backfired.  He told he that he would dance with her if the orchestra would agree to play "Ni**ers in Vienna," which pushed things a bit too far and made Kim decide to make her exit.

She was filming for her reality show "Keeping Up Wit The Kardashians" at the time and apparently filmed a lot of the inappropriate behavior that took place.  On top of the Black Face and "Ni**ers in Vienna" line, Kim also claims that Mr.s Lugner was aggressively attempting to get her to be alone.  You can only imagine that these kinds of antics wouldn't sit too well with Kanye.

Source: tmz.com