Carey Hart declared his daughter was ''more punk than yours'' as he showed off her new hairstyle.

The 42-year-old motocross rider took to social media to share a picture of his seven-year-old daughter Willow's purple locks and joked about her new punk streak.

He wrote on Instagram: ''Have you met my daughter Wednesday Addams??? Love you munchkin. #MyDaughterIsMorePunkThanYours (sic)''

And Carey later took to social media to wish his daughter a happy birthday.

Alongside a picture of Willow, he wrote: ''Happy 7th birthday to my bad ass daughter Willow!!!!! I love this little girl more than life itself. She is becoming such a strong, smart, sensitive, little girl.

''I'm so proud of everything you are and I enjoy every moment we are together. Even when you are giving me a hard time! Happy 7th big girl, your mamma, little brother, and papa love you around the moon 10 million times and back. (sic)''

The new hairstyle comes after Pink - who also has 17-month-old Jameson with Carey - revealed she raises her children in a ''label-less'' household.

She explained: ''I feel like gender-neutral is in itself a label and I'm label-less, I don't like labels at all so I believe that a woman and a girl can do anything. [I believe in] fairness and justice. And I believe that a boy can do anything. So I have boys that flip dirt bags and I have boy friends that wear dresses. It's all OK to me. It's whatever floats your boat. So that's the kind of house that we live in.''