Christina Aguilera's 44th Birthday: A Sizzling Celebration

Guess who turned 44 and did it in style? Christina Aguilera, known for her hit "Dirrty, " celebrated her birthday with a sassy snap on Instagram. The black-and-white photo shows her crouching seductively in hot pants, letting her cleavage do the talking. No top, just a strategic hand covering her modesty. She paired her bottoms with strappy heels and a messenger cap. Fans went wild, praising her youthful look. Even her long-term partner, Matthew Rutler, would approve. They've been together since she starred in the 2010 movie "Burlesque, " where they met. They have a daughter together, and Christina also has a son from her previous marriage to Jordan Bratman. Her first public romance was with backup dancer Jorge Santos, and she was linked to Limp Bizkit's Fred Durst too. But let's get back to the birthday suit – it sure got everyone's attention!