And while the Gala's biggest goal is to raise funds for groundbreaking AIDS research, having Demi Moore as host and Cher perform might've definitely made some attendees RSVP "yes" right away.

CAP D’ANTIBES, France — “Are you ready for Cher? Are you ready for Cher?!” Demi Moore asked the crowd ... who’d co-founded the HIV/AIDS research nonprofit. “She was a gift to all ...

Andreas Rentz/Getty Images for amfAR; Stephane Cardinale - Corbis/Corbis via Getty Demi Moore knows there's no Cher and Cher alike — but there is one way she does try to emulate the one-of-a ...