Madonna and Janet Jackson, the sister of Michael, have discussed working together, according to reports.The pair are said to have met over dinner at Butter in New York shortly before the MTV Video Music Awards on Sunday.A source told the Daily Mirror: “It was a meeting of two great musical try minds. “Madonna was so impressed with Janet's tribute to Michael that they started talking about how great it would be to honour him by doing something together."With that one performance, Janet proved she's back on top of her game. And who better to join forces with than Madonna? The source added: “There was definitely something very interesting being planned between them."Madonna paid an emotional tribute to late King of Pop during a speech at the ceremony on Sunday. Janet also performed a special version of 'Scream' – the song she wrote with Michael – at Radio City Music Hall.