Entertainment Memorable Britney Spears Performances January 24, 2011 / 2:25 PM PST / CBS News (Photo by Andreas Rentz/Getty Images) 1999 MTV Video Music Awards (Photo by Frank Micelotta/ImageDirect) 29th Annual AMAs - Show (Photo by Frank Micelotta/ImageDirect) Britney Spears Concert (Photo by Gabe Palacio/Getty Images) MTV Super Bowl Halftime (Photo by Scott Gries/ImageDirect) Michael Jackson Concert - Day 1 (Photo by Frank Micelotta/ImageDirect) 2000 MTV Video Music Awards Britney Spears, Madonna, and Christina Aguilera (Photo by Frank Micelotta/Getty Images) Britney Spears and Madonna (Photo by Frank Micelotta/Getty Images) Britney Spears (Photo by Dave Hogan/Getty Images) Britney Spears (Photo by Frank Micelotta/Getty Images) Britney Spears (Photo by Dave Hogan/Getty Images) Britney Spears (Photo by Scott Gries/Getty Images) 31st Annual American Music Awards - Show (Photo by Frank Micelotta/Getty Images) Britney Spears (Photo by Dave Hogan/Getty Images) Britney Spears Performs In San Diego (Photo by Sandy Huffaker/Getty Images) Britney Spears (Photo by Dave Hogan/Getty Images) Britney Spears (Photo by Dave Hogan/Getty Images) UK: Britney Spears Plays Wembley Arena (Photo by Getty Images) Britney Spears Concert (Photo by Gabe Palacio/Getty Images) NBA All Star Read To Achieve (Photo by Scott Gries/NBAE/Getty Images) 31st Annual American Music Awards - Show (Photo by Frank Micelotta/Getty Images) Britney Spears (Photo by Frank Micelotta/Getty Images) NRJ Music Awards Ceremony (Photo by Bruno Bebert-Pool/Getty Images) NRJ Music Awards Ceremony (Photo by Bruno Bebert-Pool/Getty Images) Showtime Presents Britney Spears Live In Miami (Photo by Frank Micelotta/Getty Images) Sweden: Britney Spears Plays Stockholm (Photo by Patrik Jonsson/Getty Images) Britney Spears Plays Belfast (Photo by ShowbizIreland/Getty Images) Smash Hits Poll Winners Party 1999 (Photo by Dave Hogan/Getty Images) Madonna Performs at Dodger Stadium (Photo by Kevin Winter/Getty Images) Britney Spears Performs On ABC's "Good Morning America" (Photo by Bryan Bedder/Getty Images) Britney Spears (Photo by Brenda Chase/Online USA, Inc) Britney Spears Performs On ABC's "Good Morning America" (Photo by Bryan Bedder/Getty Images) "The Circus Starring Britney Spears" Tour Opens In New Orleans (Photo by Kevin Mazur/Getty Images for Jive Records)
