Britney Spears is dancing into the new year. On Sunday, Jan. 4, the pop star, 44, shared a video on Instagram, in which she could be seen dancing to Christina Aguilera's song "I Am." Spears, wearing a ...

Christina Aguilera has said that she never considered Britney Spears a competitor. Aguilera started her pop career one year after her Mickey Mouse Club co-star scored her debut hit with 'Baby One More ...

Christina Aguilera has built her entire career on her voice. However, hitting high notes isn’t her only vocal superpower. As this promo for The Voice reveals, Aguilera, 34, is also an adept vocal ...