Always held on the last Thursday of the festival, the evening brings together notable names and those with thick wallets to raise money for AIDS research ... Then Demi Moore, the evening's host ...

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.

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 ...