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Back to brown! Demi Lovato debuted a surprisingly natural-looking hair color on Twitter.

PHOTOS: More dramatic hair color makeovers

"Gonna give my hair a breeaaakkk, give my hair a break, gonna give my hair a break, my hair a break… Oh yeah, yeah," the "Heart Attack" singer posted on April 10, changing the lyrics to her song "Give Your Heart a Break."

PHOTOS: Celebs who rock rainbow-colored hair

While Lovato, 21, is no stranger to rainbow-colored hair including shades of blue, purple, and most recently pink, the medium-brown color flatters her fair skin tone and dark eyes. Plus, the neutral hair color allows the "Neon Lights" singer to have more fun with her makeup -- like the cherry red lipstick she's rocking in the picture.

PHOTOS: Demi through the years

Besides playing with color, Lovato's not afraid to try new styles. In March, she debuted a shaved side of her head on Twitter. "So…This happened… Oops," she wrote alongside the picture.

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