Move over, Britney.

R&B singer (and Diddy's ex) Cassie showed off a bold new 'do in NYC over the weekend.

She shaved half her head!

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"Sometimes in life, you need a change," she explained (via Twitter). "Something that displays the 'I don't give a f---' attitude that was always present, but never showcased. Something deeper than what you thought you were capable of. And something that will shock your mother, but make her call you a ROCK STAR."

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"Yeah, I did it. They ask why??" she went on, adding (in all caps), "LOL B/C I WOKE UP AND FELT LIKE IT!!!"