Zendaya Debuts Dramatic Pixie 'Do at the GRAMMYs

Zendaya shocks on the GRAMMY red carpet.

K.C. Undercover star Zendaya Coleman isn't afraid to try a new look!

The 18-year-old Disney actress and former Dancing with the Stars contestant debuted a stunning new pixie cut during ET's GRAMMYs pre-show live on Pop -- but before her fans freak out -- she revealed the secret behind her new 'do.

"I've always wanted to cut my hair and it's one of those things that I've always told my fans," she explained. "I didn't really cut my hair so don't freak out. But I had to try it. I had to at least feel it out, you know what I'm saying? Try it on for size."

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"I just like to change my hairstyle every time I walk on a red carpet which I think, you know, us fellow ladies, we can understand," she added. "Because guys, they get one and they get to flip it to one side or the other side, but us girls we like to change the color, the cut, the this, the that, so, yeah."

Zendaya, the face of Madonna and daughter Lourdes Leon's clothing line Material Girl, also dished that the legendary "Living for Love" singer is actually her dream GRAMMY collaborator.

"Madonna's definitely a number one because I'm the face of Material Girl ... so I cannot wait to finally meet her today," she revealed. "We've only communicated through like Instagram, Twitter ... And she's gorgeous, I just saw her over there, oh my God, she looks amazing."

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In June, ET caught up with Zendaya when she dropped out of the controversial Lifetime TV biopic on the late Aaliyah. Watch the video to hear her explain the hard decision.