Although First Lady Michelle Obama has already made names out of up-and-coming designers, the stylish figure did something quite unusual this past weekend.

For Sunday’s “Christmas in Washington” concert, Obama -- wait for it -- wore a vintage garment. Why is this worth noting?

"[This is] truly an historic event, as this may be the first time a First Lady has worn a vintage dress," New York Vintage boutique owner Jon Schneck said.

The one-of-a-kind 1950’s dress featured a black-lace overlay, square neckline and a full tea-length tulle style skirt. It was one of several items she purchased at Jon's shop.

“We are truly honored that the First Lady has chosen a gown from New York Vintage as her first venture into vintage couture, “ Schneck added. “Other dresses from our archive have been scheduled for use by the first lady later this year.”