Christina Aguilera cancels tour, needs more time to rehearse

Christina Aguilera has canceled her 20-date summer tour, scheduled to start in July.

Live Nation explains: "Christina Aguilera's summer tour has been moved to 2011 due to prior commitments that the singer had made to her film, 'Burlesque,' and to the promotion of her new album, 'Bionic.' The singer felt she needed more time to rehearse the show and with less than a month between the album release and tour dates this wasn't possible."