Kim Kardashian was the latest celebrity paid ($500,000, in this case) to escort Austrian businessman Richard Lugner to the Vienna Opera Ball last night, but the evening didn't exactly go as planned. Sources tell TMZ Kardashian was posing for pictures with Lugner when a worker approached her in blackface, pretending to be Kanye West. She stayed at the ball, but then another man asked her to dance—and when she tried to decline, the guy told her the orchestra should play "N-----s in Vienna" for them to dance to, and she stormed out of the event.
Prior to the ball, Lugner complained to reporters that "Kim is annoying me, because she's not sticking to the program," Radar reports. Hours after Kardashian arrived in Vienna, with mom Kris Jenner and daughter North West in tow, Lugner says she stood him up to go film scenes for Keeping Up With the Kardashians. "The guest should be with me and not anywhere else that is not agreed upon," said 81-year-old Lugner. But Kardashian had her own complaints, sources say: She claims Lugner grabbed her aggressively and was attempting to get alone with her. At least Kardashian showed up for the escort gig: In 2010, Lindsay Lohan bailed. (Read more Kim Kardashian stories.)