Why yes, yes it is. What would Blair Waldorf think?

Gossip Girl star Leighton Meester went out with flair last night to the American Eagle flagship store opening in New York City.

The sultry actress, who is now trying her hand at a music career with her new single, “Somebody to Love,” showed up to the opening in a short leather dress with a bandeau top underneath, and later changed into multi-colored leggings, studded ankle boots, and a top-knot hairdo for an unprecedented, ultra-mod look.

Meester also performed at the event. Check out a fan video of her appearance, after the jump.

Here’s a quick video of part of Leighton’s performance (feat. her song with Cobra Starship, “Good Girls Go Bad“)