John Mayer and Michael Buble are among the guys who've teamed up with Barbra Streisand for a new album of love song duets.

Babs Facebooked some of the details about Partners, which is set for release on September 19th, but won't release a song list until later this week. Some of the other performers who turned up to pay homage to the diva include Josh Groban, Billy Joel and Elvis Presley -- in a rare  posthumous appearance created via studio magic.

The album, Barbra's 64th, follows on the heels of Love Is the Answer, which debuted at number-one on the Billboard chart.