American singer Tony Bennett recorded a song with Winehouse for his forthcoming album, Duets II, which is scheduled for release on 20 September 2011.Following her death Winehouse's spokesperson said the singer left behind “plenty” of material but no discussions had taken place in regards to releasing it. It is uncertain how far along she had gotten in the recording process.The proceeds from the single will go to a charity set up in Winehouse's name.