Ask moms and dads with multiple kiddos about the difference between having one child, and well, more than one child, and they'll probably tell you the same thing: it's infinitely harder. Apparently, Pink and her husband Carey Hart are in the very same boat. In a recent Instagram, she explained how big the jump between having one and two kids is. But despite all the challenges that come with being a parent, there are numerous sweet moments that make all the sleepless nights and tantrums worth it. "When it comes to children: 1 is 1, and 2 is 10. But when they look out for each other, your heart explodes," she wrote. "Also, Wu tang clan ain't nothing to f*ck with." All we can say is: fair enough!