'Burlesque'

Christina Aguilera poses for photographers as she arrives to attend the gala premiere of the film 'Burlesque' at Leicester Square in central London on December 13, 2010. (AFP/Ben Stansall)

US actress and singer Cher poses upon her arrival to the gala premiere of the film 'Burlesque' at Leicester Square in London on December 13, 2010. (AFP/Ben Stansall)

U.S actress and singers Cher and Christina Aguilera, arrive for the UK Gala Premiere of Burlesque at Leicester Square in London. (AP/Joel Ryan)

U.S. director Steven Antin poses for photographers at the premiere of his new film 'Burlesque' in Leicester Square in London December 13, 2010. (REUTERS/Kieran Doherty)

Cher arrives for the British Gala Premiere of 'Burlesque,' at a cinema in Leicester Square. (AP/Jorge Herrera)

Kristen Bell arrives for the British Gala Premiere of 'Burlesque,' at a cinema in Leicester Square, central London. (AP/Jorge Herrera)

Christina Aguilera arrives for the British Gala Premiere of 'Burlesque,' at a cinema in Leicester Square, central London. (AP/Jorge Herrera)

U.S. singer and actress Christina Aguilera arrives at the afterparty for her film 'Burlesque' at a central London club. (AP/Jorge Herrera)

U.S. actress Kristen Bell arrives at the afterparty for 'Burlesque' at a central London club. (AP/Jorge Herrera)

U.S. dancer and actress Chelsea Traille arrives for the afterparty for the film 'Burlesque' at a central London club. (AP/Jorge Herrera)