Pop singer Christina Aguilera on Monday canceled plans for a summer concert tour blaming work on a new film and an upcoming album that squeezed rehearsal time, according to a statement from her spokeswoman. The American singer will appear in new movie “Burlesque,” due in theaters later this year, and she is currently promoting a new album “Bionic,” which is set for release on June 8. “The singer felt she needed more time to rehearse the show and with less than a month between the album release and tour date this wasn’t possible,” the statement said. The North American tour had been set to start in July. New dates will be announced later this year, the statement said. The first single from “Bionic,” a tune called “Not Myself Tonight,” debuted in March on Aguilera’s official website and became available on iTunes in April.