Veteran musician Tony Bennett will be present at the wedding to sing their hit duet 'Cheek to Cheek', reported Life and Style magazine.
"The estate is set in the hills above Malibu and is surrounded by undeveloped mountains. She calls it the 'closest thing to heaven'," a source said.
Flowers for the ceremony will reportedly be ordered from Sea Lily Malibu and cases of champagne will apparently be brought in.
Besides Bennett, other celebrity friends who are also invited to the nuptials are Donatella Versace and Kelly Osbourne.