Solange Knowles, Beyoncé's sister, brutally attacked Jay Z in a lift for unclear reasons! We don't know why (YET!), but I believe we will know all about it in the right time.

TMZ,as always, was around and obtained the surveillance video. Apparently, it happened during a Met Gala after party at the Standard Hotel, last week, in NYC!
Solange, Jay Z, Beyoncé and a body-guard were inside the lift together.

Ladies and gentlemen, enjoy the show!