This has been answered before but i'll say anyway! Well it's called feeling good. At first it was by Muse but obviously they didn't want to be associated with such an unethical company like nestle so they said no (see www.babymilkaction.org as to why). Nestle then got someone similar (Eon John) to sing it instead.
http://www.drownedinsound.com/articles/6993.html