Posted July 3, 200718 yr Madonna will make soon a duet withAnnie Lennox for her new album in autumn: 'Songs Of Mass Destruction', that will contain the song 'Sing'. The profits for the on-line download are going to TAC, Treatment Action Activities. For this purpose, Lennox had contact with 23 of the most important singers of the world to record with her the song, to raise attention for the problem of the transmission of the HIV from mother to the son. Madonna and these other singers will join Lennox: Joss Stone, Celine Dion, Dido, Gladys Knight, k.d. Lang, Angelique Kidjo, Bonnie Raitt, Shakira, Melissa Ethridge, Sarah McLachlan, Fergie, Anastacia, Beverly Knight, Faith Hill, Pink, Sugababes, Martha Wainwright, Iso*bel Campbell, Beth Gibbons, KT Tunstall, Shingai Shoniwa e Beth Orton. This is a rumour, but hoping it's true!!!