Ever-changing Christina Aguilera [1] has left behind her platinum blond and lavender hair [2], and her transformation to a readhead is so hot!

The singer and The Voice judge showed off her bombshell new hair [3] on Instagram, giving us serious Jessica Rabbit vibes with her soft Old Hollywood waves right before hitting the stage at a concert in support of presidential candidate Hillary Clinton.

It's been a while since Christina, whose dad is from Ecuador, sported a fiery look — you might remember her red streaks from her "Come on Over (All I Want Is You)" days. Scroll ahead for more photos of her new hair shade, then watch a young Christina slay [4] Whitney Houston's "I Have Nothing."