Barnes, who has also made-up the likes of Jennifer Lopez and Kim Kardashian, says it was his idea for Aguilera to try a more subtle look, although he is not sure how long the change will last, reported Contactmusic.
"Christina didn't really want to change anything, but sometimes, too much of too much is definitely too much. I cut back on the bronzer and redefined her look a bit, while keeping to who she is. She has a very expensive voice and I wanted her look to reflect that.
"It was fun playing with her look, but at the end of the day, the girl loves her make-up! She's very opinionated about the way she looks, but she really likes the end result. She looks beautiful," he said.
The 31-year-old actress has previously said she finds it hard to stay with one style for too long because she gets bored.