AceShowbiz -

Madonna has placed Britney Spears as a cameo on her "Sticky and Sweet" video screen. While, Madonna sings "Human Nature" at her first concert in Millennium Stadium of the Welsh city, Cardiff this weekend, Britney is seen stuck in a lift, wearing black glasses and a hooded top. Then, she whispers lines "Express yourself, don't repress yourself."

Britney's appearance then makes some saying that Madonna is actually giving a favor to help Britney's comeback. However, the others claim that their collaboration is mutual because Madonna reportedly takes advantage of Britney's recent good reputation in order to draw more crowds to her concert.

There is no further explanation whether Britney will also tape another appearance in Madonna's next show that will be held in London's Wembley Stadium on September 11. Live Nation Global Touring as "Sticky and Sweet" producer gives no statement to the question.

Madonna performed with dancers in bondage clothes and black masks in her "Sticky and Sweet" premiere. Message "Game Over" then filled the wide screen as Madonna left the stage after performing energetically with skipping contest and pole-dancing.

Britney Spears' pre-recorded cameo for Madonna's "Sticky and Sweet":