Britney Spears has had her ups and downs but her fans swear the pop star is back. Britney kicked off her Femme Fatale tour in Los Angeles last night to great acclaim.

Britney's costumes have been controversial over the years. From her sparkly nude bodysuit on the 2000 MTV Video Music Awards, her red pleather body suit in the 'Oops...I Did It Again' video to her barely there jungle costume and albino snake neck accessory BritBrit has always kept us guessing...especially with the tube sock on her arm at the 2001 Superbowl Half-Time Show. A tube sock, Britney? Why?

Here's a look back at some of her most interesting outfits.

Britney Spears
U.S. singer Britney Spears, shown performing September 7, 2000 at the MTV Video Awards in New York. Reuters
Britney Spears
Singer Britney Spears performs at the National Car Rental Center in Sunrise, Florida, July 13, 2002. Britney is seen performing the song "Slave." Reuters
Britney Spears
Singer Britney Spears performs at the National Car Rental Center in Sunrise, Florida, July 13, 2002. Britney is suspended over the crowd from cables after she jumped out of the water off of a floating barge. Reuters
Britney Spears
Britney Spears, Madonna and Christina Aguilera open the 2003 MTV Video Music Awards at the Radio City Music Hall in New York, August 28, 2003. Reuters
Britney Spears
Entertainer Britney Spears performs on the National Mall during the 2003 NFL Kickoff Live concert in Washington, D.C., on September 4, 2003. Reuters
Britney Spears
Singer Britney Spears performs on ABC's "Good Morning America" in New York on December 2, 2008. Reuters
Britney Spears
Pop star Britney Spears performs during the 60th Bambi media awards ceremony in the southwestern German town of Offenburg November 27, 2008. Reuters
Los Angeles Britney spears Los Angeles Britney spears