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Kellie Pickler and pro partner Derek Hough won the 16th season of Dancing With the Stars on Tuesday night, beating out Zendaya and Val Chmerkovsky and Jacoby Jones and Karina Smirnoff.

Pickler and Hough had a combined team score of 94 for both nights of the final competition, and Pickler, who rose to fame on American Idol, clearly wasn't expecting to take home the top prize. "Oh my God!" she exclaimed when her name was called. "This is amazing, oh my God!"

"I never thought I'd do this show," she told Us Weekly on Monday evening. "Part of me wanted to, but I was honestly scared to. My grandpa talked me into doing it. It's his favorite show -- and he wanted me to have Derek as a partner! I'm kind of nervous that whoever wins tomorrow night, my grandpa might run out there and snatch the Mirror Ball trophy anyway!"

Congrats!

Country cutie Kellie Pickler has a big voice ... but an even bigger heart.

The former American Idol contestant stopped by The Ellen DeGeneres Show to discuss shaving her head in support of her BFF Summer who was diagnosed in June with breast cancer.

Kellie tells Ellen:

"We made a pact that we would shave our heads together. I think last thing that you want (for) anyone that you love to feel like… is that you don’t want them to walk through the valley alone. I think it’s important to have a cancer buddy."

As for the moment she shaved off all her blonde hair, she adds:

"That is probably one of the most beautiful moments of my life. Just being able to do that with her.

We think Kellie is beautiful both inside and out.

Former American Idol star Kellie Pickler has shaved her head in support for her friend, Summer Holt Miller, who was diagnosed with breast cancer back in June.

Pickler told GMA, "Cancer does not discriminate."

Miller added, "If this compels even one person to change their mentality toward waiting until the age of 40 for their mammogram, then it will be worth it."

What an incredible gesture!