Former Dutch model Karen Mulder is on vacation in St. Barts where she decided it would be fantastic idea to do cartwheels along the beach in a bikini. Karen Mulder is 44. She has way too much energy. When I’m 44, I just want someone to wheel me around. It doesn’t even matter in what. It could be a wheelchair or a Big Wheel. I prefer a Big Wheel though. I’d want to ride around in style.