Can anyone name this tune?

Someone told me that it was by Gwen stefani, but all I can remember is that it has a little, "who-hooo, who-hooo" being repeated several times during the song and that the words "my whole world" are repeated a lot during the the song as well. My four year old daughter would like a copy of the song but I cant figure out the name of it. PLEASE HELP ME, Yahooer's