09 December 2010Singing sensation Christina Aguilera has reopened speculation about a potential boob job following an appearance in Tokyo. The star was promoting her new film, Burlesque, when photographers snapped pictures that later led to speculation. According to the Daily Mail, experts have suggested that the pictures - which show what could be a subtle scar in the singer's armpit - prove Christina has been under the knife. Christina's bust size has been the subject of much discussion in recent years, as have rumours she may have had a nose job in the past, but she hasn't ever revealed to the press whether she's undergone cosmetic surgery or not. Well known for her curves, Christina is among the number of Hollywood stars who are happy to flaunt womanly figures and is credited as being an inspiration for more curvaceous women everywhere. Earlier this year, Christina was also cited as one of a number of celebrity mums - alongside Victoria Beckham - who are providing inspiration for women who want to look their best after giving birth. Speaking about her new film role prior to the Tokyo premier, Christina explained some of her initial reservations about accepting the role. She said: "I was scared of being out there with real, professional dancers. "It's harder than it looks." However, director-writer Steven Antin had more than enough faith in the star to convince her to take the role, claiming she had the needed qualities to portray the small town girl trying to make it big the film demanded.