Christina Aguilera is really working it!
The 35-year-old singer is flaunting her impressive weight loss in a new Instagram post, showing off her lean curves in a sexy Santa outfit.
(Photo Credit: Getty Images, Instagram)
The mother-of-two's weight has definitely fluctuated through the years — but it's clear, she's now looking healthier than ever.
Click through the gallery below to see Christina Aguilera's amazing transformation through the years!