The 28-year-old stars alongside Veronica Mars actress Kristen Bell and Cher in the movie as an erotic dancer who works in a strip club.
Preparing for the role, Aguilera reportedly got in touch with professional dancer Von Teese for some dancing tips.
"Christina is meticulous in her preparation for anything she does," a source told Showbiz Spy.
"She is already training hard to be ready for this role and has asked Dita for some coaching on the more technical aspects of burlesque dancing.
"She doesn't want to have to use a double for anything if she can help it."