Beyonce and Solange Knowles arrived on the red carpet for the grand opening of Marquee Nightclub at The Cosmopolitan in Las Vegas last week.

Solange sported a cropped or afro ‘do for most of 2010, but she starts 2011 long braids.

Beyonce sticks to the same old, same old blonde ‘do wearing an Alexander McQueen Spring 2011 dress.

Her Folklore floral organza print dress is an interesting mix of two looks from the runway.

I like how she paired her modified dress with a black leather belt.

I can well imagine that Bey wore black pumps, which I think may have worked perfectly well with this look.

Beyonce becomes the second person after Noomi Rapace to wear a look from Alexander McQueen’s Spring 2011 collection.

Hopefully we’ll see more stars (Cate Blanchett, Tilda Swinton, Anna Paquin) wearing this collection in 2011.

Credit: Style.com & Rex