JAY Z, BEYONCE and her sister SOLANGE KNOWLES went to a fashion event in New York last week. And apparently something happened at an after party that made Solange ATTACK Jay Z in an elevator. TMZ released the surveillance video, and since there's no audio, it's unclear what Solange was upset about. But she was going CRAZY! Weird thing is Beyonce just stands there....at one point she does come between them.