Britney Spears through the years

Spears began a two-year residency at Planet Hollywood Resort & Casino in Las Vegas on December 27, 2013, with the debut of her show "Britney: Piece of Me."

Spears began a two-year residency at Planet Hollywood Resort & Casino in Las Vegas on December 27, 2013, with the debut of her show "Britney: Piece of Me."