"The Voice" alum -- who turned the big 3-5 on Friday -- took to Instagram to thank her fans for all of their sweet birthday love.
In the photo, Xtina looks gorgeous wearing a long-sleeved, skin-tight black dress. She completes her look with thigh-high boots, her blonde tresses styled straight and a bold red lip. We've honestly never seen the mother-of-two look better!
"Thank you for all the Bday wishes!! Love you my #fighters! Xo Xtina," she posted with the stunning snapshot.
Though Christina has taken some well-needed time off since welcoming daughter Summer Rain with fiance Matt Rutler, we can't wait to see the "Beautiful" singer return to "The Voice" for Season 10!
Aguilera will be back in the big red chair alongside Blake Shelton, Adam Levine and Pharrell Williams this February.
What do you think about "Fighter" singer's sexy snapshot? Sound off below and check out the gallery above to see more pop stars then and now!