Pink's husband Carey Hart competes in NZ motocross competition

Carey Hart, the husband of singer Pink and X Games gold medallist, has competed at a New Zealand motocross competition after hearing about the event on social media.

Hart and his pop superstar wife, who is performing the first of her seven New Zealand shows on Saturday in Dunedin, landed in the country on Friday.

Quickly hitting the road to Timaru, Hart said he tried to ride in lots of "cool places" and wouldn't want to miss the opportunity to compete.

"I don't know if I'll ever have the opportunity to come and ride down here in the South Island of New Zealand again, so I hired a car and got a hotel room, loaded my gear bag and jammed down, and here I am," he said.

While Hart said hadn't raced in about six months, his first hit out on the track on Saturday earned him fourth place.

Organisers of the weekend event were ecstatic Hart, who was the first person to do a back flip on a 250cc motorcycle, wanted to come to their event for a "skid and a bike".

"I had that 'I hope he turns up' thought, but he's a genuine guy," said race organiser Noel May. "He just enjoys his dirt bike, like he does in the States. Moto's in his blood. He's been doing it for years. A chance to have a skid in another country is great for him."

Despite his celebrity status, low-key Hart was happy to prepare for his race in among all the local competitors, with a queue of eager fans all wanting an autograph or picture.

Hart said while a lot of people at the event were going to his wife's show that evening, he would be staying put with another day of racing on Sunday.