Trailblazing pop star Pink saw firsthand severely malnourished children during a recent visit to Haiti as a part of a UNICEF program to provide therapeutic food packets to children in need.The singer, whose given name is Alecia Moore, was named a UNICEF ambassador Monday to help promote a new effort to encourage physical activity in young children in the United States and at the same time raise money for nutritional, vitamin-rich peanut paste to be delivered to hungry children all over the world."I got to watch mommas learning how to feed it to their kids," Moore said during a phone interview from California.