I could be convinced to believe in time travel after seeing Christina ... brought back the infamous blonde-and-black “Dirrty” ...

At 44, the singer shared a black and white photo ... shows a self-confident Christina Aguilera who fully embraces her femininity. With her voluminous blonde hair and impeccable makeup, the star ...

As if we needed any more evidence that Christina Aguilera is thee experimental hair muse of our generation ... Not only has the star sported pink and black-blonde highlights but green and blue ...

To complement the pink hair, Aguilera wore a baby pink lipstick to match, and made her lips pop even more with the addition of brown lip liner. The glam continued with fringed eyelashes ...

As if we needed any more evidence that Christina Aguilera is thee experimental hair muse of our generation ... Not only has the star sported pink and black-blonde highlights but green and blue ...