Mary-Kate & Ashley Olsen Miss for a Must

Mary-Kate Olsen and her twin sis and business partner, Ashley, kick off Fashion Week at JCPenney and People StyleWatch‘s “Miss for a Must” event, held on Thursday (September 8) in New York City.

The 25-year-old fashionistas checked out the event at JCPenney’s store in midtown Manhattan, where guests brought in a fashion “miss” from their closet and traded it in for a gift card.

Guests also got tips from experts to avoid a future faux pas!

You can win a shopping trip in New York with a fashion stylist – learn more over at MissForAMust.com!