Rihanna attended the launch party of her River Island collection at the brand's Oxford Street store in London last night (March 4) in one of the set's dresses. Expect these duds to fly off the shelves, since RiRi made that look gooooooooooood.

She wore her hair in flowing, ombre waves. It was shaved and sexy-short on the sides, a look she's been rocking forever. Check out the keyhole back of the dress, too. What a gorgeous, peek-a-boo detail, right?

Stuart Wilson, Getty Images

As mentioned, she wore a long and long-sleeved, clingy black dress with a mega slit from her River Island collection to the party. There's no better promotion for designs that you co-created and that you put your name on than by wearing them when being photographed at a high profile event. Not only was it a consumer chess move, but she looked uh-mazing! That fabric hugs her figure. Can you blame it?

Stuart Wilson, Getty Images

Her strappy, ruby heels matched her Bordeaux lip shade, too. Ri's got some killer gams, doesn't she?

Stuart Wilson, Getty Images

The New York flagship Opening Ceremony store also opened its 'RIHtrospective,' celebrating some of the 'Stay' singer's hottest looks from her career. It launched in conjunction with her River Island collection.

See the 'RIHtrospective' below and walk down Rihanna Memory Lane.

Neilson Barnard, Getty Images
Neilson Barnard, Getty Images
Neilson Barnard, Getty Images
Neilson Barnard, Getty Images
Neilson Barnard, Getty Images

Watch the Rihanna 'Stay' Video