There were three singles released for the project by avex to raise funds for the victims of the attacks on September 11th.
"a song is born"
Sung by: Ayumi Hamasaki & Keiko
"the meaning of peace"
Sung by: Kumi Koda & BoA
"lovin' it"
Sung by: Namie Amuro & VERBAL
Which one is your favorite?
Oh, and before anyone shouts this out at me, let me say one thing.
If I remember correctly, the captialization for the song Ayu sang is different than that of the captialization of the solo version on her album "I am..." On the single it's "a song is born" while on the album it's "A Song is born."

XD
EDIT: Yeah, had a feeling that this was in the wrong thread. ^^;; I completely forgot about the forum it's supposed to be in, "Asian Music Chat."