Madonna Sticky & Sweet Tour First Look With Britney's Cameo

The pop queen Madonna kicks off her “Sticky & Sweet” world tour at the Millennium Stadium in the Welsh city of Cardiff in front of an audience of 40.000.
During a performance of 'Human Nature' Britney Spars appears as a cameo, she is stuck in an elevator repeating words '“express yourself, don’t repress yourself”.
Check it out in the clip below...