The hitmaker, who worked on several tracks for the LP including the songs 'Glam', 'Prima Donna' and 'Desnudate', said that the whole campaign was "out of sync", and her new movie Burlesque will mark her return to the top.
"It just seemed like the timing was a little bit off and things got a little bit out of sync for her on that project," he told Entertainment Weekly.
"This film is going to bring her right back where she needs to be. When she starts to focus on a new project, I think it’s going to be amazing.
"It’s a matter of if it can be marketed properly. When I listen to [Bionic], I definitely am a fan. More than anything, it was promoted poorly."
It was recently reported that Aguilera had begun working on her fifth studio album, which she described as "introspective".