Celebrity style: Christina Aguilera

Singer Christina Aguilera attends an autograph session for her DVD "Back to Basics - Live and Down Under" in West Hollywood, California. (REUTERS)
Singer and actress Christina Aguilera sits atop her star at ceremonies unveiling her star of the Hollywood Walk of Fame in Hollywood, California. (REUTERS)
Cast member Christina Aguilera poses at the premiere of "Burlesque" at the Grauman's Chinese theatre in Hollywood, California. (REUTERS)
Christina Aguilera poses for photographers as she arrives at the premiere of her new film "Burlesque" in Leicester Square in London. (REUTERS)
US singer Christina Aguilera poses as she arrives at the Cannes festival palace to attend the NRJ Music Awards, in Cannes, southeastern France. (REUTERS)
Singer Christina Aguilera arrives at the 2010 MTV Movie Awards in Los Angeles. (REUTERS)
Cast member Christina Aguilera poses in front of the Crazy Horse cabaret during the photocall of the movie "Burlesque" in Paris. (REUTERS)
Singer Christina Aguilera arrives at the 43rd Annual Grammy Awards at the Staples Center in Los Angeles. (REUTERS)
Pop music star Christina Aguilera arrives at the 59th Primetime Emmy Awards in Los Angeles, California. (REUTERS)
Pop start Christina Aguilera poses for photographers as she arrives at the 2003 MTV Video Music Awards at the Radio City Music Hall in New York. (REUTERS)
Presenter Christina Aguilera poses backstage at the 67th annual Golden Globe Awards in Beverly Hills, California. (REUTERS)
Christina Aguilera blows a kiss upon arriving for Us Weekly magazines Young Hollywood Hot 20 party in Los Angeles. Singer Christina Aguilera blows a kiss upon arriving for Us Weekly magazine's "Young Hollywood Hot 20" party in Los Angeles. (REUTERS)
Singer Christina Aguilera arrives as a guest for a benefit concert by the Rolling Stones for the Natural Resources Defense Council (NRDC) in Los Angeles. (REUTERS)
Singer Christina Aguilera performs a cappella, her hit single "Beautiful" during the 14th annual GLAAD Media Awards, at the Kodak Theatre in the Hollywood section of Los Angeles, California. (REUTERS)
Christina Aguilera is seen in the front row at the Agent Provocateur fashion show of the fall 2006 collection at Smashbox Studios in Culver City, California. (REUTERS)