Oprah Winfrey, Vogue editor-in-chief Anna Wintour, and Gap creative director Patrick Robinson co-chaired the annual Metropolitan Museum of Art's Costume Institute Gala Benefit on Monday night in New York.
This year's theme celebrated the American woman.
Winfrey walked the arrival line with Oscar de la Renta, wearing a navy couture gown by the designer. The talk show host said her plan for the evening was to relax and literally, let her hair down.
"This is my hair down and partying," said Winfrey. "I wore it curly because I was here today with straight hair and by the time I got back home it was like all wilted so I thought it has to be curly tonight."
Stars of all ages and from every part of the entertainment industry attended the Met Costume Gala, including Justin Timberlake, Sarah Jessica Parker, Jennifer Lopez, Emma Watson and Taylor Swift. Many were accompanied by the designer who dressed them.
"It's just wonderful to be included in a night like this and to be invited," said Swift. "There are all kinds of beautiful people walking around that I'm excited to see what they're wearing."
Lady Gaga was slated to perform at the ball but didn't walk the red carpet. Instead, the famous face with the most unusual dress was singer Katy Perry. She wore a dress that literally lit up with LED lights.
"I feel like I really have to represent those girls that just go for it and do their own thing and, you know, have their own bit of spontaneity and self confidence," Perry said. "I think sometimes in fashion it can get a little stuffy so I wanted to lighten up!"
The Associated Press contributed to this report.