As one does, Christina Aguilera ... hair colour, perfectly in theme with the movie. Side note: Is anyone else getting 2012 dip-dye hair trend flashbacks? Bc I certainly am! Not only has the ...

Don't tell Christina ... Aguilera is no stranger to swapping her hair color. While she's usually an icy blonde, she's experimented with bold streaks of red and black when she was in her "Dirrty ...