Thanks to Elle magazine, Whitney Port was selected as one of three designers featured on fashion Web site ruelala.com. The City star assumed that her former coworker Olivia Palermo, who works for the fashion mag, put her up for the honor.

Wrong!

In fact, Olivia is not supporting the line that Whitney showed at Fashion Week and failed to show up at the photo shoot for the Web site. So, on Tuesday’s episode of The City, Whitney has to confront Olivia.

“I’m really unsure of what to do right now,” Whitney says.

Good thing her mentor Kelly Cutrone has an idea of how to handle the situation. “You need to … take this b—– out,” she says. “You need to go to her and you need to say, ‘Listen, I will destroy you.’ “

Watch the clip.