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Not only is she counting down the days until underage boyfriend Justin Bieber turns 18, but Selena Gomez is also busy playing around with an edgy new hairstyle!

The 19-year-old starlet posted this pic on Twitter yesterday afternoon, and she shows off a dramatically different look for her brunette locks. Selena wrote, "Change is good... My girls @ninezeroone take care of me always :) LOVE".

We can't wait to get another peek at her blue-tipped 'do, but we wanna know if she's going to switch up her style with a more rock 'n roll-inspired wardrobe...