Singing to "No One"

My cousin, Latisha, had a birthday party for her son Elias on Sunday. All of our kids sang along with Alicia Keyes' song "No One", and my neice, Aaliyah, provided the dance moves. I just realized there is no sound...try this: http://myspacetv.com/index.cfm?fuseaction=vids.individual&videoid=24345400