Who sings this song?(Collaboration of Artists)?

I cannot think of the song title/song lyrics of this one song. It's a cover song, but I have NO IDEA who sung the song orginally. But in the video that the artist remade they were wearing blindfolds and it had a word on them, and slowly they would remove the blindfold. Justin Timberlake, Gwen Stefani, Nelly and other artist were in the video. The video appeared in 2001 after the Sept. 11 tradgey. Does anyone know the song title/song lyrics, its been bothering me!!! Thanks!