Article continues below advertisementChristina Aguilera just turned heads again - and the timing couldn't be better.The pop diva had fans doing a double take after she dropped a series of jaw-dropping photos on Instagram, rocking a plunging blue dress with a high slit that hugged every curve.Article continues below advertisementWith a glowing sunset behind her, the 44-year-old posed like a pro, her platinum blonde hair falling perfectly over her shoulders as she gave the camera a fierce look."Chasing sunsets 💙💙," she wrote in the caption.