Pink has hit back at criticism for allowing her daughter to ride on a motorcycle.

The 'So What' singer's husband Carey Hart posted a picture of two-year-old Willow enjoying a bike ride with him, but the snap has resulted in some negative blowback from fans who feel the tot is too young to be on a motorbike.

Pink leapt to her husband's defence on Twitter today (29.10.13), insisting little Willow was perfectly safe with Carey, 38, who is a motorcross champion.

She wrote: ''If any of u have more experience on a bike than my husband, then I will listen to your opinions on how he should take my daughter for a ride. I can't promise I will care, but I will listen none the less. (sic)''

The 34-year-old star also pinpointed some of the negative messages she received and bit back.

One tweet read: ''wait until she's 16 and let her decide for herself. Bikes are no joke! (sic)''

Pink responded: ''Yeah ok. I've never met you but that's great (sic)''

Another critical tweet directed at the star said: ''Honestly.. I wouldn't like the idea of a child so young being on a bike. (sic)''

The singer replied: ''Then I don't recommend it for your child.''

Just days prior, Carey gushed over his daughter's first motorcycle ride, posting a picture of father and daughter together.

He captioned the snap: ''Been waiting for this day for a very long time. Willz went for her 1st ride on my motorcycle around the pits today. She was pumped the whole time. When we stopped, she gave me a big hug and said it was fun, thank you Papa. That's my girl. (sic)''