(Photo by Jason Kempin/Getty Images for Clear Channel)LOS ANGELES, CA - SEPTEMBER 11: Singer Britney Spears arrives at the premiere of Fox's 'The X Factor' Season 2 and handprint ceremony at the Chinese Theatre on September 11, 2012 in Los Angeles, California.(Photo by Kevin Winter/Getty Images)LAS VEGAS, NV - AUGUST 15: Britney Spears performs during her Britney: Piece Of Me Show at Planet Hollywood Casino Resort on August 15, 2014 in Las Vegas, Nevada.Spears is the subject of the documentary 'I Am Britney Jean' which details her personal and professional life.(Photo by Michelangelo Di Battista/Sony/RCA via Getty Images)LAS VEGAS, NV - SEPTEMBER 21: Entertainer Britney Spears attends the i Heart Radio Music Festival at the MGM Grand Garden Arena on September 21, 2013 in Las Vegas, Nevada.All proceeds go to children's programs and charities. (Photo by KMazur/Wire Image)LOS ANGELES, UNITED STATES: Pop star Britney Spears (l) and her boyfriend, singer Justin Timberlake of the group NSYNC arrive backstage at the 28th Annual American Music Awards 08 January 2001 in Los Angeles.
(Photo by Frank Micelotta/Getty Images) Britney Spears performs at the 28th Annual American Music Awards at the Shrine Auditorium in Los Angeles, CA on Monday, January 8, 2001 broadcast live on ABC.
(Photo by Imeh Akpanudosen/Getty Images)THE TONIGHT SHOW WITH JAY LENO Tonight Show with Jay Leno -- Episode 4341 -- Pictured: (l-r) Britney Spears during an interview with host Jay Leno on October 29, 2012 -- (Photo by: Paul Drinkwater/NBC/NBCU Photo Bank via Getty Images)HOLLYWOOD, CA - SEPTEMBER 11: Britney Spears arrives at the 'The X Factor' Season 2 Premiere Party at Grauman's Chinese Theatre on September 11, 2012 in Hollywood, California.
(Photo by Steve Granitz/Wire Image)LOS ANGELES, CA - OCTOBER 11: Britney Spears attends 'We Will Always Love You: A GRAMMY Salute to Whitney Houston' at Nokia Theatre L. Live on October 11, 2012 in Los Angeles, California. (Photo by FOX via Getty Images)LOS ANGELES, CA - OCTOBER 10: Recording artist Britney Spears attends City Of Hope Honors Halston CEO Ben Malka With Spirit Of Life Award - Red Carpet at Exchange LA on October 10, 2012 in Los Angeles, California.
(Photo by Gregg De Guire/Wire Image)WEST HOLLYWOOD, CA - FEBRUARY 24: Britney Spears arrives at the 21st Annual Elton John AIDS Foundation Academy Awards Viewing Party at Pacific Design Center on February 24, 2013 in West Hollywood, California.
(Photo by Maury Phillips/Wire Image)LOS ANGELES, CA - APRIL 17: In this handout photo provided by the LA Dodgers, Britney Spears poses with sons Jayden James Federline (L) and Sean Preston Federline (R) during a game against the San Diego Padres at Dodger Stadium on April 17, 2013 in Los Angeles, California.