Inside Fashion Week's Most Glamorous Show

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Ireland Baldwin and Elle creative director Joe Zee took ET behind the scenes of the Marchesa fashion show.

The two fashionistas made a day out of the event, starting with Ireland's Marchesa fitting. The budding model, 18, went with a black lace Marchesa Voyage mini-dress with gold sequins.

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"I don't think many people would be able to pull off something like this," said Ireland, praising the designer's creativity. "It's all detail. I love that."

Once dressed, Ireland, fashion's new "it" girl, was mobbed on the street by fans and paparazzi.

"It's like a runway show," said Joe, capturing it all on his camera phone.

Backstage, Ireland and Joe congratulated Marchesa's co-founders -- Keren Craig and Georgina Chapman -- who are gearing up for the Oscars.

Click the video to see their response to being the talk of the town leading up to Hollywood's biggest night.