I have been dying to see Victoria Beckham's dress collection on someone other than Victoria, and I don't think you can get much higher in the celebrity world than Madonna.
Madonna wears Victoria favourite dress, the black strapless dress. The pictures are from W magazine in which Madonna is the cover star.
The dress is the same dress Victoria wore to Marc Jacobs Spring 2009 show.
Thanks to Posh Lover and everyone else who gave me the heads up.