Trouble ensued on 'The City' (Tue., 10:30PM ET on MTV) when Whitney Port and Roxy Olin went to Miami to put on a runway show. During the model auditions, Roxy noticed a rival designer casting one of their models. Whitney just had to intervene.

"I noticed she's trying on your stuff," said Whitney. "But I know you're [on the runway] right before us, so it's probably not possible for us to share any models. And I know I saw her first, so I kinda have dibs."

The designer simply chuckled and strutted off. Said Whitney: "What's her problem? This bitch keeps stealing our models!"