This Sunday (September 6) marks the 25th anniversary of one of the most iconic pop performances of all time: Britney Spears performing “I’m a Slave 4 U” live at the 2001 MTV VMAs. Opening with a then-at-the-height-of-her-career Spears locked in a cage alongside a live tiger and climaxing with her dancing around the stage with a live python draped across her shoulders, the performance has been endlessly referenced in the years since. At Coachellahellip;read more raquo;nbsp;nbsp;nbsp;nbsp;nbsp;nbsp;View Gallery (9 images)nbsp;