The 29-year-old sparked controversy at the weekend when she cavorted around the X Factor stage wearing next to nothing.
And the 'Burlesque' star might have raised a few more eyebrows after leaving her ex-husband at home with their son, Max, as she hit London with her new man Matthew Rutler.
Christina and Matthew, who met on the set of her latest film, went to Hix, a restaurant and bar in Soho, according to witnesses.
It sounds similar to when she previously visited London nightclub Mahiki on Friday.