Britney Spears over the years: 11 sexiest tour outfits (Photos)

Slideshow posted in Photos | Wednesday, September 18, 2013

1 of 12: Britney Spears announced on Sept. 17, 2013 a two-year concert residency in Las Vegas. Check out photos of the pop star wearing 11 of her sexiest stage outfits in concert during her tours over the years. (Alexandre Marchi /